30990536 has 8 divisors (see below), whose sum is σ = 58107270. Its totient is φ = 15495264.

The previous prime is 30990529. The next prime is 30990551. The reversal of 30990536 is 63509903.

It can be written as a sum of positive squares in only one way, i.e., 30360100 + 630436 = 5510^2 + 794^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 30990496 and 30990505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1936901 + ... + 1936916.

Almost surely, 2^30990536 is an apocalyptic number.

It is an amenable number.

30990536 is a deficient number, since it is larger than the sum of its proper divisors (27116734).

30990536 is a wasteful number, since it uses less digits than its factorization.

30990536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3873823 (or 3873819 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 35.

The square root of 30990536 is about 5566.9144056650. The cubic root of 30990536 is about 314.1060942150.

The spelling of 30990536 in words is "thirty million, nine hundred ninety thousand, five hundred thirty-six".