990402 has 16 divisors (see below), whose sum is σ = 2263872. Its totient is φ = 282960.

The previous prime is 990397. The next prime is 990463. The reversal of 990402 is 204099.

990402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×990402² = 1961792243208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11749 + ... + 11832.

It is an arithmetic number, because the mean of its divisors is an integer number (141492).

2⁹⁹⁰⁴⁰² is an apocalyptic number.

990402 is an abundant number, since it is smaller than the sum of its proper divisors (1273470).

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

990402 is a wasteful number, since it uses less digits than its factorization.

990402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23593.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 990402 is about 995.1894292043. The cubic root of 990402 is about 99.6790376002.

The spelling of 990402 in words is "nine hundred ninety thousand, four hundred two".