990031140 has 192 divisors, whose sum is σ = 3602565120. Its totient is φ = 220993920.

The previous prime is 990031129. The next prime is 990031177. The reversal of 990031140 is 41130099.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 63 ways as a sum of consecutive naturals, for example, 159495 + ... + 165585.

It is an arithmetic number, because the mean of its divisors is an integer number (18763360).

Almost surely, 2^990031140 is an apocalyptic number.

990031140 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 990031140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1801282560).

990031140 is an abundant number, since it is smaller than the sum of its proper divisors (2612533980).

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

990031140 is a wasteful number, since it uses less digits than its factorization.

990031140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6159 (or 6151 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 990031140 is about 31464.7602882971. The cubic root of 990031140 is about 996.6659430849.

The spelling of 990031140 in words is "nine hundred ninety million, thirty-one thousand, one hundred forty".