989870 has 32 divisors (see below), whose sum is σ = 2073600. Its totient is φ = 333216.

The previous prime is 989869. The next prime is 989873. The reversal of 989870 is 78989.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a zygodrome in base 6.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 989870.

It is not an unprimeable number, because it can be changed into a prime (989873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5441 + ... + 5619.

It is an arithmetic number, because the mean of its divisors is an integer number (64800).

2⁹⁸⁹⁸⁷⁰ is an apocalyptic number.

989870 is an abundant number, since it is smaller than the sum of its proper divisors (1083730).

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

989870 is a wasteful number, since it uses less digits than its factorization.

989870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 989870 is about 994.9221075039. The cubic root of 989870 is about 99.6611866852.

The spelling of 989870 in words is "nine hundred eighty-nine thousand, eight hundred seventy".