30970820 has 12 divisors (see below), whose sum is σ = 65038764. Its totient is φ = 12388320.

The previous prime is 30970783. The next prime is 30970837. The reversal of 30970820 is 2807903.

It can be written as a sum of positive squares in 2 ways, for example, as 13060996 + 17909824 = 3614^2 + 4232^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 774251 + ... + 774290.

It is an arithmetic number, because the mean of its divisors is an integer number (5419897).

Almost surely, 2^30970820 is an apocalyptic number.

It is an amenable number.

30970820 is an abundant number, since it is smaller than the sum of its proper divisors (34067944).

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

30970820 is a wasteful number, since it uses less digits than its factorization.

30970820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548550 (or 1548548 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 30970820 is about 5565.1433045340. The cubic root of 30970820 is about 314.0394692566.

The spelling of 30970820 in words is "thirty million, nine hundred seventy thousand, eight hundred twenty".