634057656 has 64 divisors (see below), whose sum is σ = 1619896320. Its totient is φ = 206743680.

The previous prime is 634057643. The next prime is 634057657. The reversal of 634057656 is 656750436.

It is a super-2 number, since 2×634057656² = 804058222264428672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634057657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 639321 + ... + 640311.

It is an arithmetic number, because the mean of its divisors is an integer number (25310880).

Almost surely, 2^634057656 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 634057656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (809948160).

634057656 is an abundant number, since it is smaller than the sum of its proper divisors (985838664).

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

634057656 is a wasteful number, since it uses less digits than its factorization.

634057656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556 (or 1552 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 42.

The square root of 634057656 is about 25180.5015041401. The cubic root of 634057656 is about 859.0984133577.

The spelling of 634057656 in words is "six hundred thirty-four million, fifty-seven thousand, six hundred fifty-six".