30471872 has 56 divisors (see below), whose sum is σ = 63983616. Its totient is φ = 14370048.

The previous prime is 30471869. The next prime is 30471887. The reversal of 30471872 is 27817403.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186863 + ... + 187025.

Almost surely, 2^30471872 is an apocalyptic number.

30471872 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 30471872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31991808).

30471872 is an abundant number, since it is smaller than the sum of its proper divisors (33511744).

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

30471872 is a wasteful number, since it uses less digits than its factorization.

30471872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 30471872 is about 5520.1333317231. The cubic root of 30471872 is about 312.3439118097.

The spelling of 30471872 in words is "thirty million, four hundred seventy-one thousand, eight hundred seventy-two".