30907220 has 12 divisors (see below), whose sum is σ = 64905204. Its totient is φ = 12362880.

The previous prime is 30907199. The next prime is 30907229. The reversal of 30907220 is 2270903.

It can be written as a sum of positive squares in 2 ways, for example, as 7828804 + 23078416 = 2798^2 + 4804^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30907229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 772661 + ... + 772700.

It is an arithmetic number, because the mean of its divisors is an integer number (5408767).

Almost surely, 2^30907220 is an apocalyptic number.

It is an amenable number.

30907220 is an abundant number, since it is smaller than the sum of its proper divisors (33997984).

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

30907220 is a wasteful number, since it uses less digits than its factorization.

30907220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545370 (or 1545368 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 30907220 is about 5559.4262293873. The cubic root of 30907220 is about 313.8243571217.

The spelling of 30907220 in words is "thirty million, nine hundred seven thousand, two hundred twenty".