990430 has 16 divisors (see below), whose sum is σ = 2037600. Its totient is φ = 339552.

The previous prime is 990397. The next prime is 990463. The reversal of 990430 is 34099.

It is an interprime number because it is at equal distance from previous prime (990397) and next prime (990463).

It is a junction number, because it is equal to n+sod(n) for n = 990395 and 990404.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7005 + ... + 7144.

It is an arithmetic number, because the mean of its divisors is an integer number (127350).

2⁹⁹⁰⁴³⁰ is an apocalyptic number.

990430 is an abundant number, since it is smaller than the sum of its proper divisors (1047170).

It is a weird number, because it is abundant, but not a pseudoperfect number.

990430 is a wasteful number, since it uses less digits than its factorization.

990430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14163.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 990430 is about 995.2034967784. The cubic root of 990430 is about 99.6799769449.

The spelling of 990430 in words is "nine hundred ninety thousand, four hundred thirty".