870646 has 8 divisors (see below), whose sum is σ = 1492560. Its totient is φ = 373128.

The previous prime is 870643. The next prime is 870679. The reversal of 870646 is 646078.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870641) 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 3 ways as a sum of consecutive naturals, for example, 31081 + ... + 31108.

It is an arithmetic number, because the mean of its divisors is an integer number (186570).

2⁸⁷⁰⁶⁴⁶ is an apocalyptic number.

870646 is a deficient number, since it is larger than the sum of its proper divisors (621914).

870646 is a wasteful number, since it uses less digits than its factorization.

870646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62198.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 870646 is about 933.0841333985. The cubic root of 870646 is about 95.4876495089.

The spelling of 870646 in words is "eight hundred seventy thousand, six hundred forty-six".