256345092 has 18 divisors (see below), whose sum is σ = 647983518. Its totient is φ = 85448352.

The previous prime is 256345087. The next prime is 256345099. The reversal of 256345092 is 290543652.

256345092 is a `hidden beast` number, since 2 + 563 + 4 + 5 + 0 + 92 = 666.

It can be written as a sum of positive squares in only one way, i.e., 147476736 + 108868356 = 12144^2 + 10434^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 7120697 = 256345092 / (2 + 5 + 6 + 3 + 4 + 5 + 0 + 9 + 2).

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (256345099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3560313 + ... + 3560384.

Almost surely, 2^256345092 is an apocalyptic number.

It is an amenable number.

256345092 is an abundant number, since it is smaller than the sum of its proper divisors (391638426).

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

256345092 is a wasteful number, since it uses less digits than its factorization.

256345092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7120707 (or 7120702 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 256345092 is about 16010.7804931552. The cubic root of 256345092 is about 635.2456048709.

The spelling of 256345092 in words is "two hundred fifty-six million, three hundred forty-five thousand, ninety-two".