870426 has 32 divisors (see below), whose sum is σ = 1968000. Its totient is φ = 288684.

The previous prime is 870413. The next prime is 870431. The reversal of 870426 is 624078.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 870426.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 870426.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4275 + ... + 4473.

It is an arithmetic number, because the mean of its divisors is an integer number (61500).

2⁸⁷⁰⁴²⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 870426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (984000).

870426 is an abundant number, since it is smaller than the sum of its proper divisors (1097574).

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

870426 is an equidigital number, since it uses as much as digits as its factorization.

870426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 870426 is about 932.9662373312. The cubic root of 870426 is about 95.4796060360.

It can be divided in two parts, 870 and 426, that added together give a 4-th power (1296 = 6⁴).

The spelling of 870426 in words is "eight hundred seventy thousand, four hundred twenty-six".