2256870 has 64 divisors (see below), whose sum is σ = 6759936. Its totient is φ = 468480.

The previous prime is 2256857. The next prime is 2256887. The reversal of 2256870 is 786522.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1822 + ... + 2798.

It is an arithmetic number, because the mean of its divisors is an integer number (105624).

2^2256870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2256870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3379968).

2256870 is an abundant number, since it is smaller than the sum of its proper divisors (4503066).

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

2256870 is a wasteful number, since it uses less digits than its factorization.

2256870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 2256870 is about 1502.2882546302. The cubic root of 2256870 is about 131.1703008203.

The spelling of 2256870 in words is "two million, two hundred fifty-six thousand, eight hundred seventy".