2256440 has 32 divisors (see below), whose sum is σ = 5346000. Its totient is φ = 854784.

The previous prime is 2256437. The next prime is 2256467. The reversal of 2256440 is 446522.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 725 + ... + 2244.

2^2256440 is an apocalyptic number.

2256440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2256440 is an abundant number, since it is smaller than the sum of its proper divisors (3089560).

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

2256440 is a wasteful number, since it uses less digits than its factorization.

2256440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2999 (or 2995 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 2256440 is about 1502.1451328018. The cubic root of 2256440 is about 131.1619696932.

The spelling of 2256440 in words is "two million, two hundred fifty-six thousand, four hundred forty".