30939192 has 64 divisors (see below), whose sum is σ = 86457600. Its totient is φ = 10251360.

The previous prime is 30939191. The next prime is 30939203. The reversal of 30939192 is 29193903.

It is a super-2 number, since 2×30939192² = 1914467203225728, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30939191) 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, 48717 + ... + 49347.

It is an arithmetic number, because the mean of its divisors is an integer number (1350900).

Almost surely, 2^30939192 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 30939192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43228800).

30939192 is an abundant number, since it is smaller than the sum of its proper divisors (55518408).

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

30939192 is a wasteful number, since it uses less digits than its factorization.

30939192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873 (or 863 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 36.

The square root of 30939192 is about 5562.3009627312. The cubic root of 30939192 is about 313.9325317875.

The spelling of 30939192 in words is "thirty million, nine hundred thirty-nine thousand, one hundred ninety-two".