634705764 has 48 divisors (see below), whose sum is σ = 1846419456. Its totient is φ = 164858400.

The previous prime is 634705739. The next prime is 634705781. The reversal of 634705764 is 467507436.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 342532 + ... + 344379.

It is an arithmetic number, because the mean of its divisors is an integer number (38467072).

Almost surely, 2^634705764 is an apocalyptic number.

It is an amenable number.

634705764 is an abundant number, since it is smaller than the sum of its proper divisors (1211713692).

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

634705764 is a wasteful number, since it uses less digits than its factorization.

634705764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686936 (or 686934 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 42.

The square root of 634705764 is about 25193.3674605044. The cubic root of 634705764 is about 859.3910255242.

The spelling of 634705764 in words is "six hundred thirty-four million, seven hundred five thousand, seven hundred sixty-four".