2256720 has 40 divisors (see below), whose sum is σ = 6996576. Its totient is φ = 601728.

The previous prime is 2256713. The next prime is 2256721. The reversal of 2256720 is 276522.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2256721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4462 + ... + 4941.

2^2256720 is an apocalyptic number.

2256720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2256720 is an abundant number, since it is smaller than the sum of its proper divisors (4739856).

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

2256720 is a wasteful number, since it uses less digits than its factorization.

2256720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9419 (or 9413 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 2256720 is about 1502.2383299597. The cubic root of 2256720 is about 131.1673947334.

The spelling of 2256720 in words is "two million, two hundred fifty-six thousand, seven hundred twenty".