690312232 has 24 divisors (see below), whose sum is σ = 1304736750. Its totient is φ = 342389120.

The previous prime is 690312223. The next prime is 690312263. The reversal of 690312232 is 232213096.

It can be written as a sum of positive squares in 3 ways, for example, as 34644996 + 655667236 = 5886^2 + 25606^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 690312232.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 906732 + ... + 907492.

Almost surely, 2^690312232 is an apocalyptic number.

It is an amenable number.

690312232 is a deficient number, since it is larger than the sum of its proper divisors (614424518).

690312232 is an equidigital number, since it uses as much as digits as its factorization.

690312232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1677 (or 912 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 690312232 is about 26273.7936354840. The cubic root of 690312232 is about 883.7888598474.

The spelling of 690312232 in words is "six hundred ninety million, three hundred twelve thousand, two hundred thirty-two".