256890830 has 96 divisors (see below), whose sum is σ = 580880160. Its totient is φ = 81285120.

The previous prime is 256890793. The next prime is 256890833. The reversal of 256890830 is 38098652.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256890833) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 381374 + ... + 382046.

It is an arithmetic number, because the mean of its divisors is an integer number (6050835).

Almost surely, 2^256890830 is an apocalyptic number.

256890830 is an abundant number, since it is smaller than the sum of its proper divisors (323989330).

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

256890830 is a wasteful number, since it uses less digits than its factorization.

256890830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754 (or 747 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 256890830 is about 16027.8142614643. The cubic root of 256890830 is about 635.6960808777.

The spelling of 256890830 in words is "two hundred fifty-six million, eight hundred ninety thousand, eight hundred thirty".