2789862640 has 80 divisors (see below), whose sum is σ = 6805010880. Its totient is φ = 1062225920.

The previous prime is 2789862637. The next prime is 2789862653. The reversal of 2789862640 is 462689872.

2789862640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156252 + ... + 173188.

It is an arithmetic number, because the mean of its divisors is an integer number (85062636).

Almost surely, 2^2789862640 is an apocalyptic number.

2789862640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2789862640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3402505440).

2789862640 is an abundant number, since it is smaller than the sum of its proper divisors (4015148240).

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

2789862640 is a wasteful number, since it uses less digits than its factorization.

2789862640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17050 (or 17044 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 52.

The square root of 2789862640 is about 52819.1503150136. The cubic root of 2789862640 is about 1407.7567131950.

The spelling of 2789862640 in words is "two billion, seven hundred eighty-nine million, eight hundred sixty-two thousand, six hundred forty".