869280 has 48 divisors (see below), whose sum is σ = 2739744. Its totient is φ = 231680.

The previous prime is 869273. The next prime is 869291. The reversal of 869280 is 82968.

It is a tau number, because it is divible by the number of its divisors (48).

It is a plaindrome in base 13.

It is an unprimeable number.

869280 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 in 7 ways as a sum of consecutive naturals, for example, 426 + ... + 1385.

It is an arithmetic number, because the mean of its divisors is an integer number (57078).

2⁸⁶⁹²⁸⁰ is an apocalyptic number.

869280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

869280 is an abundant number, since it is smaller than the sum of its proper divisors (1870464).

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

869280 is a wasteful number, since it uses less digits than its factorization.

869280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1829 (or 1821 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 869280 is about 932.3518649094. The cubic root of 869280 is about 95.4376849214.

The spelling of 869280 in words is "eight hundred sixty-nine thousand, two hundred eighty".