30809984 has 32 divisors (see below), whose sum is σ = 64994400. Its totient is φ = 14497792.

The previous prime is 30809971. The next prime is 30810023. The reversal of 30809984 is 48990803.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×30809984² = 1898510228160512, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4904 + ... + 9255.

It is an arithmetic number, because the mean of its divisors is an integer number (2031075).

Almost surely, 2^30809984 is an apocalyptic number.

30809984 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

30809984 is an abundant number, since it is smaller than the sum of its proper divisors (34184416).

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

30809984 is a wasteful number, since it uses less digits than its factorization.

30809984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14190 (or 14178 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 30809984 is about 5550.6741932850. The cubic root of 30809984 is about 313.4949078652.

The spelling of 30809984 in words is "thirty million, eight hundred nine thousand, nine hundred eighty-four".