30939048 has 192 divisors, whose sum is σ = 106479360. Its totient is φ = 7907328.

The previous prime is 30939043. The next prime is 30939053. The reversal of 30939048 is 84093903.

It is an interprime number because it is at equal distance from previous prime (30939043) and next prime (30939053).

It is a super-2 number, since 2×30939048² = 1914449382292608, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (30939043) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 196986 + ... + 197142.

It is an arithmetic number, because the mean of its divisors is an integer number (554580).

Almost surely, 2^30939048 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 30939048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53239680).

30939048 is an abundant number, since it is smaller than the sum of its proper divisors (75540312).

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

30939048 is a wasteful number, since it uses less digits than its factorization.

30939048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 30939048 is about 5562.2880184327. The cubic root of 30939048 is about 313.9320447423.

The spelling of 30939048 in words is "thirty million, nine hundred thirty-nine thousand, forty-eight".