634716840 has 64 divisors (see below), whose sum is σ = 1908236160. Its totient is φ = 168894720.

The previous prime is 634716821. The next prime is 634716857. The reversal of 634716840 is 48617436.

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, 53010 + ... + 63870.

It is an arithmetic number, because the mean of its divisors is an integer number (29816190).

Almost surely, 2^634716840 is an apocalyptic number.

634716840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

634716840 is an abundant number, since it is smaller than the sum of its proper divisors (1273519320).

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

634716840 is a wasteful number, since it uses less digits than its factorization.

634716840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11362 (or 11358 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 634716840 is about 25193.5872793058. The cubic root of 634716840 is about 859.3960244597.

The spelling of 634716840 in words is "six hundred thirty-four million, seven hundred sixteen thousand, eight hundred forty".