990140 has 24 divisors (see below), whose sum is σ = 2147712. Its totient is φ = 383040.

The previous prime is 990137. The next prime is 990151. The reversal of 990140 is 41099.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 990140.

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 7 ways as a sum of consecutive naturals, for example, 179 + ... + 1418.

It is an arithmetic number, because the mean of its divisors is an integer number (89488).

2⁹⁹⁰¹⁴⁰ is an apocalyptic number.

It is an amenable number.

990140 is an abundant number, since it is smaller than the sum of its proper divisors (1157572).

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

990140 is a wasteful number, since it uses less digits than its factorization.

990140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1637 (or 1635 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 990140 is about 995.0577872666. The cubic root of 990140 is about 99.6702471592.

The spelling of 990140 in words is "nine hundred ninety thousand, one hundred forty".