989790 has 16 divisors (see below), whose sum is σ = 2375568. Its totient is φ = 263936.

The previous prime is 989783. The next prime is 989797. The reversal of 989790 is 97989.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (989783) and next prime (989797).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16467 + ... + 16526.

It is an arithmetic number, because the mean of its divisors is an integer number (148473).

2⁹⁸⁹⁷⁹⁰ is an apocalyptic number.

989790 is an abundant number, since it is smaller than the sum of its proper divisors (1385778).

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

989790 is a wasteful number, since it uses less digits than its factorization.

989790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33003.

The product of its (nonzero) digits is 40824, while the sum is 42.

The square root of 989790 is about 994.8819025392. The cubic root of 989790 is about 99.6585017839.

The spelling of 989790 in words is "nine hundred eighty-nine thousand, seven hundred ninety".