30939100 has 18 divisors (see below), whose sum is σ = 67138064. Its totient is φ = 12375600.

The previous prime is 30939053. The next prime is 30939101. The reversal of 30939100 is 193903.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30939101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 154596 + ... + 154795.

Almost surely, 2^30939100 is an apocalyptic number.

It is an amenable number.

30939100 is an abundant number, since it is smaller than the sum of its proper divisors (36198964).

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

30939100 is a wasteful number, since it uses less digits than its factorization.

30939100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309405 (or 309398 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 25.

The square root of 30939100 is about 5562.2926927662. The cubic root of 30939100 is about 313.9322206199.

The spelling of 30939100 in words is "thirty million, nine hundred thirty-nine thousand, one hundred".