30388836 has 12 divisors (see below), whose sum is σ = 70907312. Its totient is φ = 10129608.

The previous prime is 30388829. The next prime is 30388871. The reversal of 30388836 is 63888303.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 30388794 and 30388803.

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, 1266190 + ... + 1266213.

Almost surely, 2^30388836 is an apocalyptic number.

It is an amenable number.

30388836 is an abundant number, since it is smaller than the sum of its proper divisors (40518476).

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

30388836 is a wasteful number, since it uses less digits than its factorization.

30388836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2532410 (or 2532408 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 30388836 is about 5512.6070057642. The cubic root of 30388836 is about 312.0599408175.

The spelling of 30388836 in words is "thirty million, three hundred eighty-eight thousand, eight hundred thirty-six".