30809906 has 24 divisors (see below), whose sum is σ = 49286160. Its totient is φ = 14441976.

The previous prime is 30809897. The next prime is 30809923. The reversal of 30809906 is 60990803.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100205 + ... + 100511.

It is an arithmetic number, because the mean of its divisors is an integer number (2053590).

Almost surely, 2^30809906 is an apocalyptic number.

30809906 is a deficient number, since it is larger than the sum of its proper divisors (18476254).

30809906 is a wasteful number, since it uses less digits than its factorization.

30809906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 30809906 is about 5550.6671671070. The cubic root of 30809906 is about 313.4946433122.

The spelling of 30809906 in words is "thirty million, eight hundred nine thousand, nine hundred six".