990397176 has 64 divisors (see below), whose sum is σ = 2592000000. Its totient is φ = 314966400.

The previous prime is 990397153. The next prime is 990397193. The reversal of 990397176 is 671793099.

It is a congruent number.

It is an unprimeable number.

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, 43450 + ... + 62198.

It is an arithmetic number, because the mean of its divisors is an integer number (40500000).

Almost surely, 2^990397176 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 990397176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1296000000).

990397176 is an abundant number, since it is smaller than the sum of its proper divisors (1601602824).

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

990397176 is a wasteful number, since it uses less digits than its factorization.

990397176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18860 (or 18856 counting only the distinct ones).

The product of its (nonzero) digits is 642978, while the sum is 51.

The square root of 990397176 is about 31470.5763531588. The cubic root of 990397176 is about 996.7887576273.

The spelling of 990397176 in words is "nine hundred ninety million, three hundred ninety-seven thousand, one hundred seventy-six".