2745856 has 40 divisors (see below), whose sum is σ = 5696064. Its totient is φ = 1320960.

The previous prime is 2745839. The next prime is 2745859. The reversal of 2745856 is 6585472.

It is a happy number.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2745859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15786 + ... + 15958.

2^2745856 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 2745856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2848032).

2745856 is an abundant number, since it is smaller than the sum of its proper divisors (2950208).

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

2745856 is an equidigital number, since it uses as much as digits as its factorization.

2745856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 206 counting only the distinct ones).

The product of its digits is 67200, while the sum is 37.

The square root of 2745856 is about 1657.0624611040. The cubic root of 2745856 is about 140.0315575119.

The spelling of 2745856 in words is "two million, seven hundred forty-five thousand, eight hundred fifty-six".