30115988 has 36 divisors (see below), whose sum is σ = 64542240. Its totient is φ = 12226032.

The previous prime is 30115963. The next prime is 30115997. The reversal of 30115988 is 88951103.

It is a super-2 number, since 2×30115988² = 1813945466432288, which contains 22 as substring.

It is a congruent number.

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 in 11 ways as a sum of consecutive naturals, for example, 320 + ... + 7767.

It is an arithmetic number, because the mean of its divisors is an integer number (1792840).

Almost surely, 2^30115988 is an apocalyptic number.

30115988 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

30115988 is an abundant number, since it is smaller than the sum of its proper divisors (34426252).

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

30115988 is a wasteful number, since it uses less digits than its factorization.

30115988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8124 (or 8115 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 30115988 is about 5487.8035679131. The cubic root of 30115988 is about 311.1231819391.

The spelling of 30115988 in words is "thirty million, one hundred fifteen thousand, nine hundred eighty-eight".