656278880 has 96 divisors (see below), whose sum is σ = 1660720320. Its totient is φ = 244203520.

The previous prime is 656278873. The next prime is 656278901. The reversal of 656278880 is 88872656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240725 + ... + 243435.

It is an arithmetic number, because the mean of its divisors is an integer number (17299170).

Almost surely, 2^656278880 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 656278880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (830360160).

656278880 is an abundant number, since it is smaller than the sum of its proper divisors (1004441440).

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

656278880 is a wasteful number, since it uses less digits than its factorization.

656278880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2832 (or 2824 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 50.

The square root of 656278880 is about 25617.9405885797. The cubic root of 656278880 is about 869.0194086727.

The spelling of 656278880 in words is "six hundred fifty-six million, two hundred seventy-eight thousand, eight hundred eighty".