30990392 has 8 divisors (see below), whose sum is σ = 58107000. Its totient is φ = 15495192.

The previous prime is 30990373. The next prime is 30990397. The reversal of 30990392 is 29309903.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30990397) by changing a digit.

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 as a sum of consecutive naturals, namely, 1936892 + ... + 1936907.

It is an arithmetic number, because the mean of its divisors is an integer number (7263375).

Almost surely, 2^30990392 is an apocalyptic number.

It is an amenable number.

30990392 is a deficient number, since it is larger than the sum of its proper divisors (27116608).

30990392 is a wasteful number, since it uses less digits than its factorization.

30990392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3873805 (or 3873801 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 35.

The square root of 30990392 is about 5566.9014720938. The cubic root of 30990392 is about 314.1056077079.

The spelling of 30990392 in words is "thirty million, nine hundred ninety thousand, three hundred ninety-two".