771338256 has 160 divisors (see below), whose sum is σ = 2220607872. Its totient is φ = 229232640.

The previous prime is 771338179. The next prime is 771338273. The reversal of 771338256 is 652833177.

Its product of digits (211680) is a multiple of the sum of its prime factors (441).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2744836 + ... + 2745116.

Almost surely, 2^771338256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 771338256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1110303936).

771338256 is an abundant number, since it is smaller than the sum of its proper divisors (1449269616).

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

771338256 is a wasteful number, since it uses less digits than its factorization.

771338256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441 (or 435 counting only the distinct ones).

The product of its digits is 211680, while the sum is 42.

The square root of 771338256 is about 27772.9770820487. The cubic root of 771338256 is about 917.0963335507.

The spelling of 771338256 in words is "seven hundred seventy-one million, three hundred thirty-eight thousand, two hundred fifty-six".