634942880 has 96 divisors (see below), whose sum is σ = 1762363008. Its totient is φ = 213120000.

The previous prime is 634942879. The next prime is 634942897. The reversal of 634942880 is 88249436.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 9005 + ... + 36755.

It is an arithmetic number, because the mean of its divisors is an integer number (18357948).

Almost surely, 2^634942880 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634942880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (881181504).

634942880 is an abundant number, since it is smaller than the sum of its proper divisors (1127420128).

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

634942880 is a wasteful number, since it uses less digits than its factorization.

634942880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27790 (or 27782 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 44.

The square root of 634942880 is about 25198.0729421914. The cubic root of 634942880 is about 859.4980304827.

The spelling of 634942880 in words is "six hundred thirty-four million, nine hundred forty-two thousand, eight hundred eighty".