30992990 has 48 divisors (see below), whose sum is σ = 68331600. Its totient is φ = 10063872.

The previous prime is 30992987. The next prime is 30992993. The reversal of 30992990 is 9929903.

It is an interprime number because it is at equal distance from previous prime (30992987) and next prime (30992993).

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30992993) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7646 + ... + 10974.

It is an arithmetic number, because the mean of its divisors is an integer number (1423575).

Almost surely, 2^30992990 is an apocalyptic number.

30992990 is an abundant number, since it is smaller than the sum of its proper divisors (37338610).

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

30992990 is a wasteful number, since it uses less digits than its factorization.

30992990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3369 (or 3362 counting only the distinct ones).

The product of its (nonzero) digits is 39366, while the sum is 41.

The square root of 30992990 is about 5567.1348106544. The cubic root of 30992990 is about 314.1143848752.

The spelling of 30992990 in words is "thirty million, nine hundred ninety-two thousand, nine hundred ninety".