2640128284 has 24 divisors (see below), whose sum is σ = 4672130400. Its totient is φ = 1305268800.

The previous prime is 2640128279. The next prime is 2640128291. The reversal of 2640128284 is 4828210462.

2640128284 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335062 + ... + 342850.

It is an arithmetic number, because the mean of its divisors is an integer number (194672100).

Almost surely, 2^2640128284 is an apocalyptic number.

It is an amenable number.

2640128284 is a deficient number, since it is larger than the sum of its proper divisors (2032002116).

2640128284 is a wasteful number, since it uses less digits than its factorization.

2640128284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8733 (or 8731 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 37.

The square root of 2640128284 is about 51382.1786614776. The cubic root of 2640128284 is about 1382.1070319208.

The spelling of 2640128284 in words is "two billion, six hundred forty million, one hundred twenty-eight thousand, two hundred eighty-four".