990990146 has 32 divisors (see below), whose sum is σ = 1635863040. Its totient is φ = 448148736.

The previous prime is 990990127. The next prime is 990990149. The reversal of 990990146 is 641099099.

It is a super-2 number, since 2×990990146² = 1964122938938202632, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 990990146.

It is not an unprimeable number, because it can be changed into a prime (990990149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217625 + ... + 222131.

It is an arithmetic number, because the mean of its divisors is an integer number (51120720).

Almost surely, 2^990990146 is an apocalyptic number.

990990146 is a deficient number, since it is larger than the sum of its proper divisors (644872894).

990990146 is a wasteful number, since it uses less digits than its factorization.

990990146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4778.

The product of its (nonzero) digits is 157464, while the sum is 47.

The square root of 990990146 is about 31479.9959656922. The cubic root of 990990146 is about 996.9876501936.

The spelling of 990990146 in words is "nine hundred ninety million, nine hundred ninety thousand, one hundred forty-six".