870424 has 8 divisors (see below), whose sum is σ = 1632060. Its totient is φ = 435208.

The previous prime is 870413. The next prime is 870431. The reversal of 870424 is 424078.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

870424 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 54394 + ... + 54409.

2⁸⁷⁰⁴²⁴ is an apocalyptic number.

It is an amenable number.

870424 is a deficient number, since it is larger than the sum of its proper divisors (761636).

870424 is a wasteful number, since it uses less digits than its factorization.

870424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108809 (or 108805 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 870424 is about 932.9651654805. The cubic root of 870424 is about 95.4795329073.

The spelling of 870424 in words is "eight hundred seventy thousand, four hundred twenty-four".