256747832 has 32 divisors (see below), whose sum is σ = 526348800. Its totient is φ = 116440800.

The previous prime is 256747811. The next prime is 256747837. The reversal of 256747832 is 238747652.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256747837) 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, 39107 + ... + 45197.

It is an arithmetic number, because the mean of its divisors is an integer number (16448400).

Almost surely, 2^256747832 is an apocalyptic number.

256747832 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

256747832 is an abundant number, since it is smaller than the sum of its proper divisors (269600968).

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

256747832 is a wasteful number, since it uses less digits than its factorization.

256747832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6587 (or 6583 counting only the distinct ones).

The product of its digits is 564480, while the sum is 44.

The square root of 256747832 is about 16023.3527078449. The cubic root of 256747832 is about 635.5781058084.

The spelling of 256747832 in words is "two hundred fifty-six million, seven hundred forty-seven thousand, eight hundred thirty-two".