869872 has 10 divisors (see below), whose sum is σ = 1685408. Its totient is φ = 434928.

The previous prime is 869863. The next prime is 869879. The reversal of 869872 is 278968.

869872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869879) by changing a digit.

869872 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27168 + ... + 27199.

2⁸⁶⁹⁸⁷² is an apocalyptic number.

It is an amenable number.

869872 is a deficient number, since it is larger than the sum of its proper divisors (815536).

869872 is a wasteful number, since it uses less digits than its factorization.

869872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54375 (or 54369 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 869872 is about 932.6692875827. The cubic root of 869872 is about 95.4593451033.

The spelling of 869872 in words is "eight hundred sixty-nine thousand, eight hundred seventy-two".