30812690 has 24 divisors (see below), whose sum is σ = 56237220. Its totient is φ = 12155264.

The previous prime is 30812681. The next prime is 30812707. The reversal of 30812690 is 9621803.

It can be written as a sum of positive squares in 6 ways, for example, as 1792921 + 29019769 = 1339^2 + 5387^2 .

It is a super-2 number, since 2×30812690² = 1898843730072200, which contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 79016 + ... + 79404.

Almost surely, 2^30812690 is an apocalyptic number.

30812690 is a deficient number, since it is larger than the sum of its proper divisors (25424530).

30812690 is an equidigital number, since it uses as much as digits as its factorization.

30812690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 30812690 is about 5550.9179421065. The cubic root of 30812690 is about 313.5040855438.

The spelling of 30812690 in words is "thirty million, eight hundred twelve thousand, six hundred ninety".