30661824 has 28 divisors (see below), whose sum is σ = 81126584. Its totient is φ = 10220544.

The previous prime is 30661823. The next prime is 30661837. The reversal of 30661824 is 42816603.

It is a junction number, because it is equal to n+sod(n) for n = 30661791 and 30661800.

It is not an unprimeable number, because it can be changed into a prime (30661823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79657 + ... + 80040.

It is an arithmetic number, because the mean of its divisors is an integer number (2897378).

Almost surely, 2^30661824 is an apocalyptic number.

It is an amenable number.

30661824 is an abundant number, since it is smaller than the sum of its proper divisors (50464760).

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

30661824 is a wasteful number, since it uses less digits than its factorization.

30661824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159712 (or 159702 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 30661824 is about 5537.3119832641. The cubic root of 30661824 is about 312.9915855475.

The spelling of 30661824 in words is "thirty million, six hundred sixty-one thousand, eight hundred twenty-four".