2628490644 has 36 divisors (see below), whose sum is σ = 7155336916. Its totient is φ = 808766208.

The previous prime is 2628490591. The next prime is 2628490663. The reversal of 2628490644 is 4460948262.

2628490644 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 2 ways, for example, as 265364100 + 2363126544 = 16290^2 + 48612^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 2628490644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2807749 + ... + 2808684.

Almost surely, 2^2628490644 is an apocalyptic number.

It is an amenable number.

2628490644 is an abundant number, since it is smaller than the sum of its proper divisors (4526846272).

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

2628490644 is a wasteful number, since it uses less digits than its factorization.

2628490644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5616456 (or 5616451 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The square root of 2628490644 is about 51268.8077099517. The cubic root of 2628490644 is about 1380.0732727320.

The spelling of 2628490644 in words is "two billion, six hundred twenty-eight million, four hundred ninety thousand, six hundred forty-four".