990179028 has 36 divisors (see below), whose sum is σ = 2564003988. Its totient is φ = 322008960.

The previous prime is 990179009. The next prime is 990179039. The reversal of 990179028 is 820971099.

It can be written as a sum of positive squares in 2 ways, for example, as 534441924 + 455737104 = 23118^2 + 21348^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 333951 + ... + 336902.

It is an arithmetic number, because the mean of its divisors is an integer number (71222333).

Almost surely, 2^990179028 is an apocalyptic number.

It is an amenable number.

990179028 is an abundant number, since it is smaller than the sum of its proper divisors (1573824960).

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

990179028 is a wasteful number, since it uses less digits than its factorization.

990179028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670904 (or 670899 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 990179028 is about 31467.1102581727. The cubic root of 990179028 is about 996.7155669767.

The spelling of 990179028 in words is "nine hundred ninety million, one hundred seventy-nine thousand, twenty-eight".