2887640872 has 16 divisors (see below), whose sum is σ = 5462242740. Its totient is φ = 1431042816.

The previous prime is 2887640857. The next prime is 2887640879. The reversal of 2887640872 is 2780467882.

2887640872 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 2887342756 + 298116 = 53734^2 + 546^2 .

It is not an unprimeable number, because it can be changed into a prime (2887640879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1596243 + ... + 1598050.

Almost surely, 2^2887640872 is an apocalyptic number.

It is an amenable number.

2887640872 is a deficient number, since it is larger than the sum of its proper divisors (2574601868).

2887640872 is a wasteful number, since it uses less digits than its factorization.

2887640872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3194412 (or 3194408 counting only the distinct ones).

The product of its (nonzero) digits is 2408448, while the sum is 52.

The square root of 2887640872 is about 53736.7739262416. The cubic root of 2887640872 is about 1424.0144406333.

The spelling of 2887640872 in words is "two billion, eight hundred eighty-seven million, six hundred forty thousand, eight hundred seventy-two".