30490820 has 24 divisors (see below), whose sum is σ = 67401600. Its totient is φ = 11554272.

The previous prime is 30490819. The next prime is 30490841. The reversal of 30490820 is 2809403.

It is a self number, because there is not a number n which added to its sum of digits gives 30490820.

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, 39740 + ... + 40499.

It is an arithmetic number, because the mean of its divisors is an integer number (2808400).

Almost surely, 2^30490820 is an apocalyptic number.

It is an amenable number.

30490820 is an abundant number, since it is smaller than the sum of its proper divisors (36910780).

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

30490820 is a wasteful number, since it uses less digits than its factorization.

30490820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80267 (or 80265 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 30490820 is about 5521.8493278973. The cubic root of 30490820 is about 312.4086388927.

The spelling of 30490820 in words is "thirty million, four hundred ninety thousand, eight hundred twenty".