30047328 has 96 divisors (see below), whose sum is σ = 88905600. Its totient is φ = 9871488.

The previous prime is 30047323. The next prime is 30047333. The reversal of 30047328 is 82374003.

It is an interprime number because it is at equal distance from previous prime (30047323) and next prime (30047333).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30047321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71503 + ... + 71921.

It is an arithmetic number, because the mean of its divisors is an integer number (926100).

Almost surely, 2^30047328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30047328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44452800).

30047328 is an abundant number, since it is smaller than the sum of its proper divisors (58858272).

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

30047328 is a wasteful number, since it uses less digits than its factorization.

30047328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521 (or 507 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 30047328 is about 5481.5443079483. The cubic root of 30047328 is about 310.8865637446.

The spelling of 30047328 in words is "thirty million, forty-seven thousand, three hundred twenty-eight".