634856 has 8 divisors (see below), whose sum is σ = 1190370. Its totient is φ = 317424.

The previous prime is 634853. The next prime is 634859. The reversal of 634856 is 658436.

It is an interprime number because it is at equal distance from previous prime (634853) and next prime (634859).

It can be written as a sum of positive squares in only one way, i.e., 538756 + 96100 = 734^2 + 310^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (634853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39671 + ... + 39686.

2⁶³⁴⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

634856 is a deficient number, since it is larger than the sum of its proper divisors (555514).

634856 is a wasteful number, since it uses less digits than its factorization.

634856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79363 (or 79359 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 634856 is about 796.7785137665. The cubic root of 634856 is about 85.9458826644.

The spelling of 634856 in words is "six hundred thirty-four thousand, eight hundred fifty-six".