656431104 has 96 divisors (see below), whose sum is σ = 2000194560. Its totient is φ = 187539456.

The previous prime is 656431103. The next prime is 656431117. The reversal of 656431104 is 401134656.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656431103) 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, 35377 + ... + 50639.

It is an arithmetic number, because the mean of its divisors is an integer number (20835360).

Almost surely, 2^656431104 is an apocalyptic number.

656431104 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656431104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1000097280).

656431104 is an abundant number, since it is smaller than the sum of its proper divisors (1343763456).

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

656431104 is a wasteful number, since it uses less digits than its factorization.

656431104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15295 (or 15275 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 656431104 is about 25620.9114591968. The cubic root of 656431104 is about 869.0865932126.

The spelling of 656431104 in words is "six hundred fifty-six million, four hundred thirty-one thousand, one hundred four".