690207904 has 24 divisors (see below), whose sum is σ = 1363153428. Its totient is φ = 344010240.

The previous prime is 690207883. The next prime is 690207907. The reversal of 690207904 is 409702096.

It can be written as a sum of positive squares in 2 ways, for example, as 689167504 + 1040400 = 26252^2 + 1020^2 .

It is not an unprimeable number, because it can be changed into a prime (690207907) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 23877 + ... + 44164.

Almost surely, 2^690207904 is an apocalyptic number.

It is an amenable number.

690207904 is a deficient number, since it is larger than the sum of its proper divisors (672945524).

690207904 is a wasteful number, since it uses less digits than its factorization.

690207904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68368 (or 68360 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 690207904 is about 26271.8081600791. The cubic root of 690207904 is about 883.7443347928.

The spelling of 690207904 in words is "six hundred ninety million, two hundred seven thousand, nine hundred four".