2787999940 has 48 divisors (see below), whose sum is σ = 6474585600. Its totient is φ = 999924480.

The previous prime is 2787999923. The next prime is 2787999997. The reversal of 2787999940 is 499997872.

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, 70740 + ... + 102859.

It is an arithmetic number, because the mean of its divisors is an integer number (134887200).

Almost surely, 2^2787999940 is an apocalyptic number.

2787999940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2787999940 is an abundant number, since it is smaller than the sum of its proper divisors (3686585660).

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

2787999940 is a wasteful number, since it uses less digits than its factorization.

2787999940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173692 (or 173690 counting only the distinct ones).

The product of its (nonzero) digits is 20575296, while the sum is 64.

The square root of 2787999940 is about 52801.5145616108. The cubic root of 2787999940 is about 1407.4433390763.

The spelling of 2787999940 in words is "two billion, seven hundred eighty-seven million, nine hundred ninety-nine thousand, nine hundred forty".