870345 has 40 divisors (see below), whose sum is σ = 1788864. Its totient is φ = 396576.

The previous prime is 870341. The next prime is 870367. The reversal of 870345 is 543078.

It is not a de Polignac number, because 870345 - 2² = 870341 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 870345.

It is not an unprimeable number, because it can be changed into a prime (870341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2682 + ... + 2988.

2⁸⁷⁰³⁴⁵ is an apocalyptic number.

It is an amenable number.

870345 is an abundant number, since it is smaller than the sum of its proper divisors (918519).

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

870345 is a wasteful number, since it uses less digits than its factorization.

870345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 870345 is about 932.9228263903. The cubic root of 870345 is about 95.4766442341.

The spelling of 870345 in words is "eight hundred seventy thousand, three hundred forty-five".