690308338 has 16 divisors (see below), whose sum is σ = 1084518720. Its totient is φ = 328914256.

The previous prime is 690308287. The next prime is 690308347. The reversal of 690308338 is 833803096.

It is a self number, because there is not a number n which added to its sum of digits gives 690308338.

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, 15520 + ... + 40267.

It is an arithmetic number, because the mean of its divisors is an integer number (67782420).

Almost surely, 2^690308338 is an apocalyptic number.

690308338 is a deficient number, since it is larger than the sum of its proper divisors (394210382).

690308338 is a wasteful number, since it uses less digits than its factorization.

690308338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56081.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 690308338 is about 26273.7195311208. The cubic root of 690308338 is about 883.7871980486.

The spelling of 690308338 in words is "six hundred ninety million, three hundred eight thousand, three hundred thirty-eight".