30320988 has 24 divisors (see below), whose sum is σ = 71720208. Its totient is φ = 9968256.

The previous prime is 30320987. The next prime is 30320993. The reversal of 30320988 is 88902303.

It is a super-2 number, since 2×30320988² = 1838724626592288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30320981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16431 + ... + 18182.

It is an arithmetic number, because the mean of its divisors is an integer number (2988342).

Almost surely, 2^30320988 is an apocalyptic number.

It is an amenable number.

30320988 is an abundant number, since it is smaller than the sum of its proper divisors (41399220).

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

30320988 is a wasteful number, since it uses less digits than its factorization.

30320988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34693 (or 34691 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 30320988 is about 5506.4496728836. The cubic root of 30320988 is about 311.8275263046.

The spelling of 30320988 in words is "thirty million, three hundred twenty thousand, nine hundred eighty-eight".