9912990 has 16 divisors (see below), whose sum is σ = 23791248. Its totient is φ = 2643456.

The previous prime is 9912979. The next prime is 9913027. The reversal of 9912990 is 992199.

It is a happy number.

9912990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 165187 + ... + 165246.

It is an arithmetic number, because the mean of its divisors is an integer number (1486953).

Almost surely, 2^9912990 is an apocalyptic number.

9912990 is an abundant number, since it is smaller than the sum of its proper divisors (13878258).

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

9912990 is a wasteful number, since it uses less digits than its factorization.

9912990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330443.

The product of its (nonzero) digits is 13122, while the sum is 39.

The square root of 9912990 is about 3148.4901143246. The cubic root of 9912990 is about 214.8167900209.

The spelling of 9912990 in words is "nine million, nine hundred twelve thousand, nine hundred ninety".