977644256 has 48 divisors (see below), whose sum is σ = 2011933728. Its totient is φ = 466752000.

The previous prime is 977644253. The next prime is 977644273. The reversal of 977644256 is 652446779.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (977644253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 750806 + ... + 752106.

It is an arithmetic number, because the mean of its divisors is an integer number (41915286).

Almost surely, 2^977644256 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 977644256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1005966864).

977644256 is an abundant number, since it is smaller than the sum of its proper divisors (1034289472).

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

977644256 is a wasteful number, since it uses less digits than its factorization.

977644256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2355 (or 2347 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 50.

The square root of 977644256 is about 31267.3033055299. The cubic root of 977644256 is about 992.4918541631.

The spelling of 977644256 in words is "nine hundred seventy-seven million, six hundred forty-four thousand, two hundred fifty-six".