2644396488 has 24 divisors (see below), whose sum is σ = 7161907350. Its totient is φ = 881465472.

The previous prime is 2644396483. The next prime is 2644396537. The reversal of 2644396488 is 8846934462.

2644396488 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2446093764 + 198302724 = 49458^2 + 14082^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (2644396481) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18363793 + ... + 18363936.

Almost surely, 2^2644396488 is an apocalyptic number.

It is an amenable number.

2644396488 is an abundant number, since it is smaller than the sum of its proper divisors (4517510862).

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

2644396488 is a wasteful number, since it uses less digits than its factorization.

2644396488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36727741 (or 36727734 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 54.

The square root of 2644396488 is about 51423.6957831698. The cubic root of 2644396488 is about 1382.8514324467.

The spelling of 2644396488 in words is "two billion, six hundred forty-four million, three hundred ninety-six thousand, four hundred eighty-eight".