690367408 has 40 divisors (see below), whose sum is σ = 1378731200. Its totient is φ = 334684224.

The previous prime is 690367367. The next prime is 690367477. The reversal of 690367408 is 804763096.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 92023 + ... + 99241.

It is an arithmetic number, because the mean of its divisors is an integer number (34468280).

Almost surely, 2^690367408 is an apocalyptic number.

It is an amenable number.

690367408 is a deficient number, since it is larger than the sum of its proper divisors (688363792).

690367408 is a wasteful number, since it uses less digits than its factorization.

690367408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7409 (or 7403 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 690367408 is about 26274.8436341684. The cubic root of 690367408 is about 883.8124060210.

The spelling of 690367408 in words is "six hundred ninety million, three hundred sixty-seven thousand, four hundred eight".