2731256 has 32 divisors (see below), whose sum is σ = 5730480. Its totient is φ = 1209600.

The previous prime is 2731243. The next prime is 2731277. The reversal of 2731256 is 6521372.

It is a zygodrome in base 5.

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, 3230 + ... + 3986.

2^2731256 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 2731256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2865240).

2731256 is an abundant number, since it is smaller than the sum of its proper divisors (2999224).

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

2731256 is a wasteful number, since it uses less digits than its factorization.

2731256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815 (or 811 counting only the distinct ones).

The product of its digits is 2520, while the sum is 26.

The square root of 2731256 is about 1652.6512033699. The cubic root of 2731256 is about 139.7829289097.

The spelling of 2731256 in words is "two million, seven hundred thirty-one thousand, two hundred fifty-six".