2774656 has 32 divisors (see below), whose sum is σ = 5645700. Its totient is φ = 1357824.

The previous prime is 2774623. The next prime is 2774669. The reversal of 2774656 is 6564772.

It can be written as a sum of positive squares in 2 ways, for example, as 2433600 + 341056 = 1560^2 + 584^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a zygodrome in base 4.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6580 + ... + 6988.

2^2774656 is an apocalyptic number.

2774656 is the 1054-th centered pentagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2774656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2822850).

2774656 is an abundant number, since it is smaller than the sum of its proper divisors (2871044).

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

2774656 is an equidigital number, since it uses as much as digits as its factorization.

2774656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476 (or 464 counting only the distinct ones).

The product of its digits is 70560, while the sum is 37.

The square root of 2774656 is about 1665.7298700570. The cubic root of 2774656 is about 140.5194309571.

The spelling of 2774656 in words is "two million, seven hundred seventy-four thousand, six hundred fifty-six".