2720256 has 160 divisors (see below), whose sum is σ = 9427968. Its totient is φ = 675840.

The previous prime is 2720251. The next prime is 2720269. The reversal of 2720256 is 6520272.

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 (2720251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118261 + ... + 118283.

2^2720256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2720256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4713984).

2720256 is an abundant number, since it is smaller than the sum of its proper divisors (6707712).

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

2720256 is a wasteful number, since it uses less digits than its factorization.

2720256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62 (or 46 counting only the distinct ones).

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

The square root of 2720256 is about 1649.3198598210. The cubic root of 2720256 is about 139.5950201150.

The spelling of 2720256 in words is "two million, seven hundred twenty thousand, two hundred fifty-six".