990765 has 32 divisors (see below), whose sum is σ = 1814400. Its totient is φ = 512640.

The previous prime is 990761. The next prime is 990767. The reversal of 990765 is 567099.

990765 = 135² + 136² + ... + 175².

It is not a de Polignac number, because 990765 - 2² = 990761 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990761) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5446 + ... + 5624.

It is an arithmetic number, because the mean of its divisors is an integer number (56700).

2⁹⁹⁰⁷⁶⁵ is an apocalyptic number.

It is an amenable number.

990765 is a deficient number, since it is larger than the sum of its proper divisors (823635).

990765 is a wasteful number, since it uses less digits than its factorization.

990765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 990765 is about 995.3717898353. The cubic root of 990765 is about 99.6912141611.

The spelling of 990765 in words is "nine hundred ninety thousand, seven hundred sixty-five".