30638120 has 16 divisors (see below), whose sum is σ = 68935860. Its totient is φ = 12255232.

The previous prime is 30638117. The next prime is 30638159. The reversal of 30638120 is 2183603.

It can be written as a sum of positive squares in 2 ways, for example, as 28793956 + 1844164 = 5366^2 + 1358^2 .

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, 382937 + ... + 383016.

Almost surely, 2^30638120 is an apocalyptic number.

It is an amenable number.

30638120 is an abundant number, since it is smaller than the sum of its proper divisors (38297740).

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

30638120 is a wasteful number, since it uses less digits than its factorization.

30638120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765964 (or 765960 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 30638120 is about 5535.1711807315. The cubic root of 30638120 is about 312.9109090552.

The spelling of 30638120 in words is "thirty million, six hundred thirty-eight thousand, one hundred twenty".