2791987990 has 16 divisors (see below), whose sum is σ = 5482449360. Its totient is φ = 1015268320.

The previous prime is 2791987981. The next prime is 2791987993. The reversal of 2791987990 is 997891972.

2791987990 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 not an unprimeable number, because it can be changed into a prime (2791987993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12690745 + ... + 12690964.

It is an arithmetic number, because the mean of its divisors is an integer number (342653085).

Almost surely, 2^2791987990 is an apocalyptic number.

2791987990 is a deficient number, since it is larger than the sum of its proper divisors (2690461370).

2791987990 is a wasteful number, since it uses less digits than its factorization.

2791987990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25381727.

The product of its (nonzero) digits is 5143824, while the sum is 61.

The square root of 2791987990 is about 52839.2656080684. The cubic root of 2791987990 is about 1408.1141043003.

The spelling of 2791987990 in words is "two billion, seven hundred ninety-one million, nine hundred eighty-seven thousand, nine hundred ninety".