30485220 has 24 divisors (see below), whose sum is σ = 85358784. Its totient is φ = 8129376.

The previous prime is 30485209. The next prime is 30485249. The reversal of 30485220 is 2258403.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253984 + ... + 254103.

It is an arithmetic number, because the mean of its divisors is an integer number (3556616).

Almost surely, 2^30485220 is an apocalyptic number.

30485220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30485220 is an abundant number, since it is smaller than the sum of its proper divisors (54873564).

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

30485220 is a wasteful number, since it uses less digits than its factorization.

30485220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508099 (or 508097 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 30485220 is about 5521.3422281181. The cubic root of 30485220 is about 312.3895118735.

The spelling of 30485220 in words is "thirty million, four hundred eighty-five thousand, two hundred twenty".