30447872 has 72 divisors (see below), whose sum is σ = 74859456. Its totient is φ = 12036096.

The previous prime is 30447863. The next prime is 30447877. The reversal of 30447872 is 27874403.

It is not an unprimeable number, because it can be changed into a prime (30447877) 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, 22643 + ... + 23949.

Almost surely, 2^30447872 is an apocalyptic number.

30447872 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30447872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37429728).

30447872 is an abundant number, since it is smaller than the sum of its proper divisors (44411584).

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

30447872 is a wasteful number, since it uses less digits than its factorization.

30447872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343 (or 1329 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 30447872 is about 5517.9590429796. The cubic root of 30447872 is about 312.2618883752.

The spelling of 30447872 in words is "thirty million, four hundred forty-seven thousand, eight hundred seventy-two".