690624634 has 64 divisors (see below), whose sum is σ = 1305722880. Its totient is φ = 267442560.

The previous prime is 690624619. The next prime is 690624653. The reversal of 690624634 is 436426096.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 428422 + ... + 430030.

It is an arithmetic number, because the mean of its divisors is an integer number (20401920).

Almost surely, 2^690624634 is an apocalyptic number.

690624634 is a deficient number, since it is larger than the sum of its proper divisors (615098246).

690624634 is a wasteful number, since it uses less digits than its factorization.

690624634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1715.

The product of its (nonzero) digits is 186624, while the sum is 40.

The square root of 690624634 is about 26279.7380884970. The cubic root of 690624634 is about 883.9221598024.

The spelling of 690624634 in words is "six hundred ninety million, six hundred twenty-four thousand, six hundred thirty-four".