990495 has 64 divisors (see below), whose sum is σ = 2073600. Its totient is φ = 443520.

The previous prime is 990487. The next prime is 990497. The reversal of 990495 is 594099.

990495 is nontrivially palindromic in base 16.

It is not a de Polignac number, because 990495 - 2³ = 990487 is a prime.

It is an Ulam number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990497) by changing a digit.

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, 34141 + ... + 34169.

It is an arithmetic number, because the mean of its divisors is an integer number (32400).

2⁹⁹⁰⁴⁹⁵ is an apocalyptic number.

990495 is an abundant number, since it is smaller than the sum of its proper divisors (1083105).

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

990495 is a wasteful number, since it uses less digits than its factorization.

990495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 990495 is about 995.2361528803. The cubic root of 990495 is about 99.6821574984.

It can be divided in two parts, 9904 and 95, that added together give a palindrome (9999).

The spelling of 990495 in words is "nine hundred ninety thousand, four hundred ninety-five".