990380 has 24 divisors (see below), whose sum is σ = 2171232. Its totient is φ = 378752.

The previous prime is 990377. The next prime is 990383. The reversal of 990380 is 83099.

It is an interprime number because it is at equal distance from previous prime (990377) and next prime (990383).

It is not an unprimeable number, because it can be changed into a prime (990383) by changing a digit.

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, 617 + ... + 1536.

It is an arithmetic number, because the mean of its divisors is an integer number (90468).

2⁹⁹⁰³⁸⁰ is an apocalyptic number.

It is an amenable number.

990380 is an abundant number, since it is smaller than the sum of its proper divisors (1180852).

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

990380 is a wasteful number, since it uses less digits than its factorization.

990380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2185 (or 2183 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 990380 is about 995.1783759709. The cubic root of 990380 is about 99.6782995312.

The spelling of 990380 in words is "nine hundred ninety thousand, three hundred eighty".