690553988 has 12 divisors (see below), whose sum is σ = 1208869200. Its totient is φ = 345162792.

The previous prime is 690553973. The next prime is 690554009. The reversal of 690553988 is 889355096.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14138 + ... + 39761.

It is an arithmetic number, because the mean of its divisors is an integer number (100739100).

Almost surely, 2^690553988 is an apocalyptic number.

It is an amenable number.

690553988 is a deficient number, since it is larger than the sum of its proper divisors (518315212).

690553988 is a wasteful number, since it uses less digits than its factorization.

690553988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57106 (or 57104 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 53.

The square root of 690553988 is about 26278.3939387475. The cubic root of 690553988 is about 883.8920191196.

The spelling of 690553988 in words is "six hundred ninety million, five hundred fifty-three thousand, nine hundred eighty-eight".