30988090 has 24 divisors (see below), whose sum is σ = 64886292. Its totient is φ = 10624320.

The previous prime is 30988063. The next prime is 30988091. The reversal of 30988090 is 9088903.

It can be written as a sum of positive squares in 2 ways, for example, as 30041361 + 946729 = 5481^2 + 973^2 .

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (30988091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31131 + ... + 32110.

Almost surely, 2^30988090 is an apocalyptic number.

30988090 is an abundant number, since it is smaller than the sum of its proper divisors (33898202).

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

30988090 is a wasteful number, since it uses less digits than its factorization.

30988090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63262 (or 63255 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 30988090 is about 5566.6947105082. The cubic root of 30988090 is about 314.0978301467.

The spelling of 30988090 in words is "thirty million, nine hundred eighty-eight thousand, ninety".