256680700 has 18 divisors (see below), whose sum is σ = 556997336. Its totient is φ = 102672240.

The previous prime is 256680679. The next prime is 256680701. The reversal of 256680700 is 7086652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256680701) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1283304 + ... + 1283503.

Almost surely, 2^256680700 is an apocalyptic number.

256680700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256680700 is an abundant number, since it is smaller than the sum of its proper divisors (300316636).

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

256680700 is a wasteful number, since it uses less digits than its factorization.

256680700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2566821 (or 2566814 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 256680700 is about 16021.2577533725. The cubic root of 256680700 is about 635.5227059914.

The spelling of 256680700 in words is "two hundred fifty-six million, six hundred eighty thousand, seven hundred".