870406 has 16 divisors (see below), whose sum is σ = 1386000. Its totient is φ = 409248.

The previous prime is 870403. The next prime is 870407. The reversal of 870406 is 604078.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870403) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 2320 + ... + 2668.

It is an arithmetic number, because the mean of its divisors is an integer number (86625).

2⁸⁷⁰⁴⁰⁶ is an apocalyptic number.

870406 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

870406 is a deficient number, since it is larger than the sum of its proper divisors (515594).

870406 is a wasteful number, since it uses less digits than its factorization.

870406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 870406 is about 932.9555187682. The cubic root of 870406 is about 95.4788747440.

It can be divided in two parts, 870 and 406, that multiplied together give a triangular number (353220 = T₈₄₀).

The spelling of 870406 in words is "eight hundred seventy thousand, four hundred six".