30631806 has 12 divisors (see below), whose sum is σ = 66368952. Its totient is φ = 10210596.

The previous prime is 30631793. The next prime is 30631817. The reversal of 30631806 is 60813603.

It is a self number, because there is not a number n which added to its sum of digits gives 30631806.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 850866 + ... + 850901.

It is an arithmetic number, because the mean of its divisors is an integer number (5530746).

Almost surely, 2^30631806 is an apocalyptic number.

30631806 is an abundant number, since it is smaller than the sum of its proper divisors (35737146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30631806 is a wasteful number, since it uses less digits than its factorization.

30631806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701775 (or 1701772 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 30631806 is about 5534.6007986123. The cubic root of 30631806 is about 312.8894123574.

The spelling of 30631806 in words is "thirty million, six hundred thirty-one thousand, eight hundred six".