30990024 has 96 divisors (see below), whose sum is σ = 91498680. Its totient is φ = 9418752.

The previous prime is 30990019. The next prime is 30990077. The reversal of 30990024 is 42009903.

It can be written as a sum of positive squares in 4 ways, for example, as 19980900 + 11009124 = 4470^2 + 3318^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 30990024.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105622 + ... + 105914.

Almost surely, 2^30990024 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 30990024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45749340).

30990024 is an abundant number, since it is smaller than the sum of its proper divisors (60508656).

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

30990024 is a wasteful number, since it uses less digits than its factorization.

30990024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431 (or 424 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 30990024 is about 5566.8684194976. The cubic root of 30990024 is about 314.1043644051.

Adding to 30990024 its reverse (42009903), we get a palindrome (72999927).

The spelling of 30990024 in words is "thirty million, nine hundred ninety thousand, twenty-four".