634919880 has 128 divisors (see below), whose sum is σ = 2196460800. Its totient is φ = 143818752.

The previous prime is 634919869. The next prime is 634919911. The reversal of 634919880 is 88919436.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91576 + ... + 98264.

It is an arithmetic number, because the mean of its divisors is an integer number (17159850).

Almost surely, 2^634919880 is an apocalyptic number.

634919880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634919880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1098230400).

634919880 is an abundant number, since it is smaller than the sum of its proper divisors (1561540920).

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

634919880 is a wasteful number, since it uses less digits than its factorization.

634919880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6823 (or 6819 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 634919880 is about 25197.6165539521. The cubic root of 634919880 is about 859.4876522823.

The spelling of 634919880 in words is "six hundred thirty-four million, nine hundred nineteen thousand, eight hundred eighty".