634505772 has 24 divisors (see below), whose sum is σ = 1490454000. Its totient is φ = 210081856.

The previous prime is 634505749. The next prime is 634505777. The reversal of 634505772 is 277505436.

It is a self number, because there is not a number n which added to its sum of digits gives 634505772.

It is not an unprimeable number, because it can be changed into a prime (634505777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175647 + ... + 179222.

It is an arithmetic number, because the mean of its divisors is an integer number (62102250).

Almost surely, 2^634505772 is an apocalyptic number.

It is an amenable number.

634505772 is an abundant number, since it is smaller than the sum of its proper divisors (855948228).

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

634505772 is a wasteful number, since it uses less digits than its factorization.

634505772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355025 (or 355023 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 39.

The square root of 634505772 is about 25189.3980078921. The cubic root of 634505772 is about 859.3007530469.

The spelling of 634505772 in words is "six hundred thirty-four million, five hundred five thousand, seven hundred seventy-two".