634543976 has 32 divisors (see below), whose sum is σ = 1299970080. Its totient is φ = 287976000.

The previous prime is 634543939. The next prime is 634543981. The reversal of 634543976 is 679345436.

It is a self number, because there is not a number n which added to its sum of digits gives 634543976.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54251 + ... + 64901.

It is an arithmetic number, because the mean of its divisors is an integer number (40624065).

Almost surely, 2^634543976 is an apocalyptic number.

It is an amenable number.

634543976 is an abundant number, since it is smaller than the sum of its proper divisors (665426104).

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

634543976 is a wasteful number, since it uses less digits than its factorization.

634543976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11345 (or 11341 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 47.

The square root of 634543976 is about 25190.1563313926. The cubic root of 634543976 is about 859.3179990508.

The spelling of 634543976 in words is "six hundred thirty-four million, five hundred forty-three thousand, nine hundred seventy-six".