30992890 has 16 divisors (see below), whose sum is σ = 55908000. Its totient is φ = 12370320.

The previous prime is 30992873. The next prime is 30992893. The reversal of 30992890 is 9829903.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (30992893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1885 + ... + 8095.

It is an arithmetic number, because the mean of its divisors is an integer number (3494250).

Almost surely, 2^30992890 is an apocalyptic number.

30992890 is a deficient number, since it is larger than the sum of its proper divisors (24915110).

30992890 is a wasteful number, since it uses less digits than its factorization.

30992890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6717.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 30992890 is about 5567.1258293665. The cubic root of 30992890 is about 314.1140470411.

The spelling of 30992890 in words is "thirty million, nine hundred ninety-two thousand, eight hundred ninety".