867990 has 16 divisors (see below), whose sum is σ = 2083248. Its totient is φ = 231456.

The previous prime is 867959. The next prime is 867991. The reversal of 867990 is 99768.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (867991) 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, 14437 + ... + 14496.

It is an arithmetic number, because the mean of its divisors is an integer number (130203).

2⁸⁶⁷⁹⁹⁰ is an apocalyptic number.

867990 is an abundant number, since it is smaller than the sum of its proper divisors (1215258).

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

867990 is a wasteful number, since it uses less digits than its factorization.

867990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28943.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 867990 is about 931.6598091578. The cubic root of 867990 is about 95.3904521296.

The spelling of 867990 in words is "eight hundred sixty-seven thousand, nine hundred ninety".