30690560 has 36 divisors (see below), whose sum is σ = 73516548. Its totient is φ = 12275712.

The previous prime is 30690521. The next prime is 30690563. The reversal of 30690560 is 6509603.

It can be written as a sum of positive squares in 2 ways, for example, as 12166144 + 18524416 = 3488^2 + 4304^2 .

It is a super-2 number, since 2×30690560² = 1883820946227200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30690563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10709 + ... + 13268.

Almost surely, 2^30690560 is an apocalyptic number.

It is an amenable number.

30690560 is an abundant number, since it is smaller than the sum of its proper divisors (42825988).

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

30690560 is an equidigital number, since it uses as much as digits as its factorization.

30690560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23998 (or 23984 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 30690560 is about 5539.9061363890. The cubic root of 30690560 is about 313.0893326997.

The spelling of 30690560 in words is "thirty million, six hundred ninety thousand, five hundred sixty".