690504656 has 20 divisors (see below), whose sum is σ = 1374012132. Its totient is φ = 335920896.

The previous prime is 690504653. The next prime is 690504673. The reversal of 690504656 is 656405096.

It can be written as a sum of positive squares in 2 ways, for example, as 488410000 + 202094656 = 22100^2 + 14216^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690504653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 582605 + ... + 583788.

Almost surely, 2^690504656 is an apocalyptic number.

It is an amenable number.

690504656 is a deficient number, since it is larger than the sum of its proper divisors (683507476).

690504656 is a wasteful number, since it uses less digits than its factorization.

690504656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166438 (or 1166432 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 690504656 is about 26277.4552801446. The cubic root of 690504656 is about 883.8709707052.

The spelling of 690504656 in words is "six hundred ninety million, five hundred four thousand, six hundred fifty-six".