30909472 has 24 divisors (see below), whose sum is σ = 66385872. Its totient is φ = 14049600.

The previous prime is 30909469. The next prime is 30909479. The reversal of 30909472 is 27490903.

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

It is not an unprimeable number, because it can be changed into a prime (30909479) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 43554 + ... + 44257.

It is an arithmetic number, because the mean of its divisors is an integer number (2766078).

Almost surely, 2^30909472 is an apocalyptic number.

30909472 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

30909472 is an abundant number, since it is smaller than the sum of its proper divisors (35476400).

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

30909472 is a wasteful number, since it uses less digits than its factorization.

30909472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87832 (or 87824 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 30909472 is about 5559.6287645849. The cubic root of 30909472 is about 313.8319790225.

The spelling of 30909472 in words is "thirty million, nine hundred nine thousand, four hundred seventy-two".