990124881 has 16 divisors (see below), whose sum is σ = 1335936000. Its totient is φ = 652220928.

The previous prime is 990124831. The next prime is 990124909. The reversal of 990124881 is 188421099.

It is not a de Polignac number, because 990124881 - 2⁷ = 990124753 is a prime.

It is a super-2 number, since 2×990124881² = 1960694559950528322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (990124831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203920 + ... + 208718.

It is an arithmetic number, because the mean of its divisors is an integer number (83496000).

Almost surely, 2^990124881 is an apocalyptic number.

It is an amenable number.

990124881 is a deficient number, since it is larger than the sum of its proper divisors (345811119).

990124881 is a wasteful number, since it uses less digits than its factorization.

990124881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5608.

The product of its (nonzero) digits is 41472, while the sum is 42.

The square root of 990124881 is about 31466.2498718865. The cubic root of 990124881 is about 996.6973984973.

The spelling of 990124881 in words is "nine hundred ninety million, one hundred twenty-four thousand, eight hundred eighty-one".