870399 has 8 divisors (see below), whose sum is σ = 1289520. Its totient is φ = 580248.

The previous prime is 870391. The next prime is 870403. The reversal of 870399 is 993078.

It is not a de Polignac number, because 870399 - 2³ = 870391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870391) 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, 16092 + ... + 16145.

It is an arithmetic number, because the mean of its divisors is an integer number (161190).

2⁸⁷⁰³⁹⁹ is an apocalyptic number.

870399 is a deficient number, since it is larger than the sum of its proper divisors (419121).

870399 is a wasteful number, since it uses less digits than its factorization.

870399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32246 (or 32240 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 870399 is about 932.9517672420. The cubic root of 870399 is about 95.4786187891.

It can be divided in two parts, 8 and 70399, that added together give a palindrome (70407).

The spelling of 870399 in words is "eight hundred seventy thousand, three hundred ninety-nine".