256731414 has 32 divisors (see below), whose sum is σ = 530559744. Its totient is φ = 82766880.

The previous prime is 256731407. The next prime is 256731421. The reversal of 256731414 is 414137652.

It is an interprime number because it is at equal distance from previous prime (256731407) and next prime (256731421).

It is a super-2 number, since 2×256731414² = 131822037868878792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21744 + ... + 31404.

It is an arithmetic number, because the mean of its divisors is an integer number (16579992).

Almost surely, 2^256731414 is an apocalyptic number.

256731414 is an abundant number, since it is smaller than the sum of its proper divisors (273828330).

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

256731414 is a wasteful number, since it uses less digits than its factorization.

256731414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9812.

The product of its digits is 20160, while the sum is 33.

The square root of 256731414 is about 16022.8403849005. The cubic root of 256731414 is about 635.5645579578.

The spelling of 256731414 in words is "two hundred fifty-six million, seven hundred thirty-one thousand, four hundred fourteen".