870849 has 24 divisors (see below), whose sum is σ = 1502592. Its totient is φ = 475200.

The previous prime is 870847. The next prime is 870853. The reversal of 870849 is 948078.

It is not a de Polignac number, because 870849 - 2¹ = 870847 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1149 + ... + 1749.

It is an arithmetic number, because the mean of its divisors is an integer number (62608).

2⁸⁷⁰⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

870849 is a deficient number, since it is larger than the sum of its proper divisors (631743).

870849 is a wasteful number, since it uses less digits than its factorization.

870849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637 (or 634 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 870849 is about 933.1929061025. The cubic root of 870849 is about 95.4950702388.

The spelling of 870849 in words is "eight hundred seventy thousand, eight hundred forty-nine".