30945892 has 6 divisors (see below), whose sum is σ = 54155318. Its totient is φ = 15472944.

The previous prime is 30945877. The next prime is 30945911. The reversal of 30945892 is 29854903.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 30404196 + 541696 = 5514^2 + 736^2 .

It is an alternating number because its digits alternate between odd and even.

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 as a sum of consecutive naturals, namely, 3868233 + ... + 3868240.

Almost surely, 2^30945892 is an apocalyptic number.

It is an amenable number.

30945892 is a deficient number, since it is larger than the sum of its proper divisors (23209426).

30945892 is a wasteful number, since it uses less digits than its factorization.

30945892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7736477 (or 7736475 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 30945892 is about 5562.9031988702. The cubic root of 30945892 is about 313.9551912475.

The spelling of 30945892 in words is "thirty million, nine hundred forty-five thousand, eight hundred ninety-two".