634528140 has 48 divisors (see below), whose sum is σ = 1853929728. Its totient is φ = 161850304.

The previous prime is 634528129. The next prime is 634528183. The reversal of 634528140 is 41825436.

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, 228522 + ... + 231281.

It is an arithmetic number, because the mean of its divisors is an integer number (38623536).

Almost surely, 2^634528140 is an apocalyptic number.

634528140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

634528140 is an abundant number, since it is smaller than the sum of its proper divisors (1219401588).

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

634528140 is a wasteful number, since it uses less digits than its factorization.

634528140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459838 (or 459836 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 634528140 is about 25189.8420002985. The cubic root of 634528140 is about 859.3108504667.

The spelling of 634528140 in words is "six hundred thirty-four million, five hundred twenty-eight thousand, one hundred forty".