2256660 has 120 divisors (see below), whose sum is σ = 8131200. Its totient is φ = 513216.

The previous prime is 2256637. The next prime is 2256673. The reversal of 2256660 is 666522.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11241 + ... + 11439.

It is an arithmetic number, because the mean of its divisors is an integer number (67760).

2^2256660 is an apocalyptic number.

2256660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2256660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4065600).

2256660 is an abundant number, since it is smaller than the sum of its proper divisors (5874540).

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

2256660 is a wasteful number, since it uses less digits than its factorization.

2256660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 2256660 is about 1502.2183596269. The cubic root of 2256660 is about 131.1662322625.

It can be divided in two parts, 2256 and 660, that added together give a square (2916 = 54²).

The spelling of 2256660 in words is "two million, two hundred fifty-six thousand, six hundred sixty".