634256940 has 48 divisors (see below), whose sum is σ = 1781646048. Its totient is φ = 168589824.

The previous prime is 634256863. The next prime is 634256957. The reversal of 634256940 is 49652436.

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, 1894 + ... + 35666.

It is an arithmetic number, because the mean of its divisors is an integer number (37117626).

Almost surely, 2^634256940 is an apocalyptic number.

634256940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

634256940 is an abundant number, since it is smaller than the sum of its proper divisors (1147389108).

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

634256940 is a wasteful number, since it uses less digits than its factorization.

634256940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34098 (or 34096 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 634256940 is about 25184.4583026914. The cubic root of 634256940 is about 859.1884086618.

The spelling of 634256940 in words is "six hundred thirty-four million, two hundred fifty-six thousand, nine hundred forty".