30930880 has 56 divisors (see below), whose sum is σ = 74230992. Its totient is φ = 12275712.

The previous prime is 30930877. The next prime is 30930881. The reversal of 30930880 is 8803903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30930881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51864 + ... + 52456.

Almost surely, 2^30930880 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 30930880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37115496).

30930880 is an abundant number, since it is smaller than the sum of its proper divisors (43300112).

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

30930880 is a wasteful number, since it uses less digits than its factorization.

30930880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773 (or 763 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 30930880 is about 5561.5537397386. The cubic root of 30930880 is about 313.9044159820.

The spelling of 30930880 in words is "thirty million, nine hundred thirty thousand, eight hundred eighty".