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128929245 = 358595283
BaseRepresentation
bin1111010111101…
…00110111011101
322222121021200020
413223310313131
5231001213440
620443222353
73123611004
oct753646735
9288537606
10128929245
11668604a5
12372179b9
13209322c3
14131a1c3b
15b4bb3d0
hex7af4ddd

128929245 has 8 divisors (see below), whose sum is σ = 206286816. Its totient is φ = 68762256.

The previous prime is 128929243. The next prime is 128929247. The reversal of 128929245 is 542929821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (128929243) and next prime (128929247).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128929245 - 21 = 128929243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128929197 and 128929206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128929243) 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, 4297627 + ... + 4297656.

It is an arithmetic number, because the mean of its divisors is an integer number (25785852).

Almost surely, 2128929245 is an apocalyptic number.

128929245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128929245 is a deficient number, since it is larger than the sum of its proper divisors (77357571).

128929245 is an equidigital number, since it uses as much as digits as its factorization.

128929245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8595291.

The product of its digits is 103680, while the sum is 42.

The square root of 128929245 is about 11354.7014491795. The cubic root of 128929245 is about 505.1850382268.

The spelling of 128929245 in words is "one hundred twenty-eight million, nine hundred twenty-nine thousand, two hundred forty-five".

Divisors: 1 3 5 15 8595283 25785849 42976415 128929245