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230423140 = 22547245131
BaseRepresentation
bin11011011101111…
…11101001100100
3121001120201010101
431232333221210
5432442020030
634510433444
75465364403
oct1556775144
9531521111
10230423140
11109082352
1265202884
1338979a6c
142286163a
15153687ca
hexdbbfa64

230423140 has 24 divisors (see below), whose sum is σ = 494186112. Its totient is φ = 90207840.

The previous prime is 230423107. The next prime is 230423147. The reversal of 230423140 is 41324032.

It is not an unprimeable number, because it can be changed into a prime (230423147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121626 + ... + 123505.

It is an arithmetic number, because the mean of its divisors is an integer number (20591088).

Almost surely, 2230423140 is an apocalyptic number.

230423140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

230423140 is an abundant number, since it is smaller than the sum of its proper divisors (263762972).

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

230423140 is a wasteful number, since it uses less digits than its factorization.

230423140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245187 (or 245185 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 230423140 is about 15179.6949903481. The cubic root of 230423140 is about 613.0680688392.

Adding to 230423140 its reverse (41324032), we get a palindrome (271747172).

The spelling of 230423140 in words is "two hundred thirty million, four hundred twenty-three thousand, one hundred forty".

Divisors: 1 2 4 5 10 20 47 94 188 235 470 940 245131 490262 980524 1225655 2451310 4902620 11521157 23042314 46084628 57605785 115211570 230423140