256986732 has 12 divisors (see below), whose sum is σ = 599635736. Its totient is φ = 85662240.

The previous prime is 256986731. The next prime is 256986733. The reversal of 256986732 is 237689652.

It is an interprime number because it is at equal distance from previous prime (256986731) and next prime (256986733).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (256986731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10707769 + ... + 10707792.

Almost surely, 2^256986732 is an apocalyptic number.

It is an amenable number.

256986732 is an abundant number, since it is smaller than the sum of its proper divisors (342649004).

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

256986732 is a wasteful number, since it uses less digits than its factorization.

256986732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21415568 (or 21415566 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 48.

The square root of 256986732 is about 16030.8057189899. The cubic root of 256986732 is about 635.7751766564.

The spelling of 256986732 in words is "two hundred fifty-six million, nine hundred eighty-six thousand, seven hundred thirty-two".