30990538 has 8 divisors (see below), whose sum is σ = 46771488. Its totient is φ = 15400044.

The previous prime is 30990529. The next prime is 30990551. The reversal of 30990538 is 83509903.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 30990497 and 30990506.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47206 + ... + 47857.

It is an arithmetic number, because the mean of its divisors is an integer number (5846436).

Almost surely, 2^30990538 is an apocalyptic number.

30990538 is a deficient number, since it is larger than the sum of its proper divisors (15780950).

30990538 is a wasteful number, since it uses less digits than its factorization.

30990538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95228.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 30990538 is about 5566.9145852977. The cubic root of 30990538 is about 314.1061009720.

The spelling of 30990538 in words is "thirty million, nine hundred ninety thousand, five hundred thirty-eight".