2788426656 has 72 divisors (see below), whose sum is σ = 7978370400. Its totient is φ = 923757696.

The previous prime is 2788426651. The next prime is 2788426709. The reversal of 2788426656 is 6566248872.

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (2788426651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17245 + ... + 76643.

It is an arithmetic number, because the mean of its divisors is an integer number (110810700).

Almost surely, 2^2788426656 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 2788426656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3989185200).

2788426656 is an abundant number, since it is smaller than the sum of its proper divisors (5189943744).

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

2788426656 is a wasteful number, since it uses less digits than its factorization.

2788426656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59578 (or 59567 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 54.

The square root of 2788426656 is about 52805.5551623122. Note that the first 3 decimals coincide. The cubic root of 2788426656 is about 1407.5151406027.

The spelling of 2788426656 in words is "two billion, seven hundred eighty-eight million, four hundred twenty-six thousand, six hundred fifty-six".