990136 has 16 divisors (see below), whose sum is σ = 2121840. Its totient is φ = 424320.

The previous prime is 990053. The next prime is 990137. The reversal of 990136 is 631099.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8785 + ... + 8896.

It is an arithmetic number, because the mean of its divisors is an integer number (132615).

2⁹⁹⁰¹³⁶ is an apocalyptic number.

It is an amenable number.

990136 is an abundant number, since it is smaller than the sum of its proper divisors (1131704).

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

990136 is a wasteful number, since it uses less digits than its factorization.

990136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17694 (or 17690 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 990136 is about 995.0557773311. The cubic root of 990136 is about 99.6701129420.

The spelling of 990136 in words is "nine hundred ninety thousand, one hundred thirty-six".