30920660 has 12 divisors (see below), whose sum is σ = 64933428. Its totient is φ = 12368256.

The previous prime is 30920651. The next prime is 30920693. The reversal of 30920660 is 6602903.

It can be written as a sum of positive squares in 2 ways, for example, as 16144324 + 14776336 = 4018^2 + 3844^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 772997 + ... + 773036.

It is an arithmetic number, because the mean of its divisors is an integer number (5411119).

Almost surely, 2^30920660 is an apocalyptic number.

It is an amenable number.

30920660 is an abundant number, since it is smaller than the sum of its proper divisors (34012768).

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

30920660 is a wasteful number, since it uses less digits than its factorization.

30920660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546042 (or 1546040 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 30920660 is about 5560.6348558416. The cubic root of 30920660 is about 313.8698393547.

The spelling of 30920660 in words is "thirty million, nine hundred twenty thousand, six hundred sixty".