990492 has 24 divisors (see below), whose sum is σ = 2352000. Its totient is φ = 324336.

The previous prime is 990487. The next prime is 990497. The reversal of 990492 is 294099.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (990487) and next prime (990497).

It is an Ulam number.

It is a congruent number.

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

990492 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9 + ... + 1407.

It is an arithmetic number, because the mean of its divisors is an integer number (98000).

2⁹⁹⁰⁴⁹² is an apocalyptic number.

It is an amenable number.

990492 is an abundant number, since it is smaller than the sum of its proper divisors (1361508).

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

990492 is a wasteful number, since it uses less digits than its factorization.

990492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465 (or 1463 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 990492 is about 995.2346456992. The cubic root of 990492 is about 99.6820568596.

The spelling of 990492 in words is "nine hundred ninety thousand, four hundred ninety-two".