30889220 has 24 divisors (see below), whose sum is σ = 65759064. Its totient is φ = 12185856.

The previous prime is 30889219. The next prime is 30889223. The reversal of 30889220 is 2298803.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 64516 + 30824704 = 254^2 + 5552^2 .

It is not an unprimeable number, because it can be changed into a prime (30889223) 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, 9119 + ... + 12038.

It is an arithmetic number, because the mean of its divisors is an integer number (2739961).

Almost surely, 2^30889220 is an apocalyptic number.

It is an amenable number.

30889220 is an abundant number, since it is smaller than the sum of its proper divisors (34869844).

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

30889220 is a wasteful number, since it uses less digits than its factorization.

30889220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21239 (or 21237 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 30889220 is about 5557.8071215183. The cubic root of 30889220 is about 313.7634227576.

The spelling of 30889220 in words is "thirty million, eight hundred eighty-nine thousand, two hundred twenty".