256692330 has 72 divisors (see below), whose sum is σ = 677434212. Its totient is φ = 67436928.

The previous prime is 256692329. The next prime is 256692391. The reversal of 256692330 is 33296652.

256692330 is a `hidden beast` number, since 2 + 566 + 92 + 3 + 3 + 0 = 666.

256692330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 252142641 + 4549689 = 15879^2 + 2133^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 561462 + ... + 561918.

Almost surely, 2^256692330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256692330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (338717106).

256692330 is an abundant number, since it is smaller than the sum of its proper divisors (420741882).

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

256692330 is a wasteful number, since it uses less digits than its factorization.

256692330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628 (or 546 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The square root of 256692330 is about 16021.6207045355. The cubic root of 256692330 is about 635.5323041906.

The spelling of 256692330 in words is "two hundred fifty-six million, six hundred ninety-two thousand, three hundred thirty".