30019990 has 64 divisors (see below), whose sum is σ = 72576000. Its totient is φ = 8634240.

The previous prime is 30019963. The next prime is 30020041. The reversal of 30019990 is 9991003.

30019990 = 586² + 587² + ... + 662².

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8511 + ... + 11509.

It is an arithmetic number, because the mean of its divisors is an integer number (1134000).

Almost surely, 2^30019990 is an apocalyptic number.

30019990 is an abundant number, since it is smaller than the sum of its proper divisors (42556010).

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

30019990 is a wasteful number, since it uses less digits than its factorization.

30019990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3037.

The product of its (nonzero) digits is 2187, while the sum is 31.

The square root of 30019990 is about 5479.0501001542. The cubic root of 30019990 is about 310.7922503585.

The spelling of 30019990 in words is "thirty million, nineteen thousand, nine hundred ninety".