690320032 has 12 divisors (see below), whose sum is σ = 1359067626. Its totient is φ = 345160000.

The previous prime is 690320021. The next prime is 690320039. The reversal of 690320032 is 230023096.

It can be written as a sum of positive squares in only one way, i.e., 633226896 + 57093136 = 25164^2 + 7556^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 690319979 and 690320006.

It is not an unprimeable number, because it can be changed into a prime (690320039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10786219 + ... + 10786282.

Almost surely, 2^690320032 is an apocalyptic number.

It is an amenable number.

690320032 is a deficient number, since it is larger than the sum of its proper divisors (668747594).

690320032 is a wasteful number, since it uses less digits than its factorization.

690320032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21572511 (or 21572503 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 690320032 is about 26273.9420719465. The cubic root of 690320032 is about 883.7921885475.

The spelling of 690320032 in words is "six hundred ninety million, three hundred twenty thousand, thirty-two".