30380988 has 96 divisors (see below), whose sum is σ = 81285120. Its totient is φ = 8751040.

The previous prime is 30380969. The next prime is 30380993. The reversal of 30380988 is 88908303.

It is a happy number.

It is a super-2 number, since 2×30380988² = 1846008863712288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 365995 + ... + 366077.

It is an arithmetic number, because the mean of its divisors is an integer number (846720).

Almost surely, 2^30380988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30380988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40642560).

30380988 is an abundant number, since it is smaller than the sum of its proper divisors (50904132).

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

30380988 is a wasteful number, since it uses less digits than its factorization.

30380988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 30380988 is about 5511.8951368835. The cubic root of 30380988 is about 312.0330750603.

The spelling of 30380988 in words is "thirty million, three hundred eighty thousand, nine hundred eighty-eight".