869520 has 40 divisors (see below), whose sum is σ = 2696256. Its totient is φ = 231808.

The previous prime is 869501. The next prime is 869521. The reversal of 869520 is 25968.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (869521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1572 + ... + 2051.

2⁸⁶⁹⁵²⁰ is an apocalyptic number.

869520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

869520 is an abundant number, since it is smaller than the sum of its proper divisors (1826736).

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

869520 is a wasteful number, since it uses less digits than its factorization.

869520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3639 (or 3633 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 869520 is about 932.4805628001. The cubic root of 869520 is about 95.4464672611.

The spelling of 869520 in words is "eight hundred sixty-nine thousand, five hundred twenty".