869040 has 120 divisors (see below), whose sum is σ = 3133728. Its totient is φ = 215040.

The previous prime is 869039. The next prime is 869053. The reversal of 869040 is 40968.

It is a tau number, because it is divible by the number of its divisors (120).

It is a junction number, because it is equal to n+sod(n) for n = 868995 and 869013.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12205 + ... + 12275.

2⁸⁶⁹⁰⁴⁰ is an apocalyptic number.

869040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 869040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1566864).

869040 is an abundant number, since it is smaller than the sum of its proper divisors (2264688).

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

869040 is a wasteful number, since it uses less digits than its factorization.

869040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 869040 is about 932.2231492513. The cubic root of 869040 is about 95.4289009651.

The spelling of 869040 in words is "eight hundred sixty-nine thousand, forty".