690496040 has 32 divisors (see below), whose sum is σ = 1673126280. Its totient is φ = 254952192.

The previous prime is 690496039. The next prime is 690496067. The reversal of 690496040 is 40694096.

It can be written as a sum of positive squares in 4 ways, for example, as 216737284 + 473758756 = 14722^2 + 21766^2 .

It is a junction number, because it is equal to n+sod(n) for n = 690495985 and 690496003.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 663419 + ... + 664458.

Almost surely, 2^690496040 is an apocalyptic number.

It is an amenable number.

690496040 is an abundant number, since it is smaller than the sum of its proper divisors (982630240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

690496040 is a wasteful number, since it uses less digits than its factorization.

690496040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327901 (or 1327897 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 690496040 is about 26277.2913368178. The cubic root of 690496040 is about 883.8672944259.

The spelling of 690496040 in words is "six hundred ninety million, four hundred ninety-six thousand, forty".