30888130 has 72 divisors (see below), whose sum is σ = 70221492. Its totient is φ = 9749376.

The previous prime is 30888127. The next prime is 30888181. The reversal of 30888130 is 3188803.

It can be written as a sum of positive squares in 6 ways, for example, as 3545689 + 27342441 = 1883^2 + 5229^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 30888092 and 30888101.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 82624 + ... + 82996.

Almost surely, 2^30888130 is an apocalyptic number.

30888130 is an abundant number, since it is smaller than the sum of its proper divisors (39333362).

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

30888130 is a wasteful number, since it uses less digits than its factorization.

30888130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 30888130 is about 5557.7090603953. The cubic root of 30888130 is about 313.7597320833.

The spelling of 30888130 in words is "thirty million, eight hundred eighty-eight thousand, one hundred thirty".