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1385143230 = 23546171441
BaseRepresentation
bin101001010001111…
…1001101110111110
310120112101120022010
41102203321232332
510314044040410
6345240232050
746216344312
oct12243715676
93515346263
101385143230
11650971679
12327a6b626
13190c793a3
14d1d65b42
158190cc20
hex528f9bbe

1385143230 has 16 divisors (see below), whose sum is σ = 3324343824. Its totient is φ = 369371520.

The previous prime is 1385143171. The next prime is 1385143231. The reversal of 1385143230 is 323415831.

It is a super-2 number, since 2×13851432302 = 3837243535229665800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 46171441 = 1385143230 / (1 + 3 + 8 + 5 + 1 + 4 + 3 + 2 + 3 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385143231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23085691 + ... + 23085750.

It is an arithmetic number, because the mean of its divisors is an integer number (207771489).

Almost surely, 21385143230 is an apocalyptic number.

1385143230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1385143230 is an abundant number, since it is smaller than the sum of its proper divisors (1939200594).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1385143230 is a wasteful number, since it uses less digits than its factorization.

1385143230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46171451.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 1385143230 is about 37217.5124101544. The cubic root of 1385143230 is about 1114.7176934816.

The spelling of 1385143230 in words is "one billion, three hundred eighty-five million, one hundred forty-three thousand, two hundred thirty".

Divisors: 1 2 3 5 6 10 15 30 46171441 92342882 138514323 230857205 277028646 461714410 692571615 1385143230