690984688 has 10 divisors (see below), whose sum is σ = 1338782864. Its totient is φ = 345492336.

The previous prime is 690984661. The next prime is 690984713. The reversal of 690984688 is 886489096.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21593256 + ... + 21593287.

Almost surely, 2^690984688 is an apocalyptic number.

It is an amenable number.

690984688 is a deficient number, since it is larger than the sum of its proper divisors (647798176).

690984688 is a wasteful number, since it uses less digits than its factorization.

690984688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43186551 (or 43186545 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 58.

The square root of 690984688 is about 26286.5876066103. The cubic root of 690984688 is about 884.0757427098.

The spelling of 690984688 in words is "six hundred ninety million, nine hundred eighty-four thousand, six hundred eighty-eight".