9942990 has 32 divisors (see below), whose sum is σ = 23970816. Its totient is φ = 2639520.

The previous prime is 9942941. The next prime is 9943057. The reversal of 9942990 is 992499.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7519 + ... + 8741.

It is an arithmetic number, because the mean of its divisors is an integer number (749088).

Almost surely, 2^9942990 is an apocalyptic number.

9942990 is an abundant number, since it is smaller than the sum of its proper divisors (14027826).

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

9942990 is a wasteful number, since it uses less digits than its factorization.

9942990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 9942990 is about 3153.2507036390. The cubic root of 9942990 is about 215.0332741002.

The spelling of 9942990 in words is "nine million, nine hundred forty-two thousand, nine hundred ninety".