30690880 has 56 divisors (see below), whose sum is σ = 79735680. Its totient is φ = 11159040.

The previous prime is 30690853. The next prime is 30690883. The reversal of 30690880 is 8809603.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (30690883) 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, 840 + ... + 7879.

Almost surely, 2^30690880 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 30690880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39867840).

30690880 is an abundant number, since it is smaller than the sum of its proper divisors (49044800).

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

30690880 is a wasteful number, since it uses less digits than its factorization.

30690880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8747 (or 8737 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 30690880 is about 5539.9350176694. The cubic root of 30690880 is about 313.0904208544.

The spelling of 30690880 in words is "thirty million, six hundred ninety thousand, eight hundred eighty".