2778981492 has 72 divisors (see below), whose sum is σ = 7803099360. Its totient is φ = 766610880.

The previous prime is 2778981481. The next prime is 2778981497. The reversal of 2778981492 is 2941898772.

2778981492 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 (2778981497) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64434 + ... + 98537.

It is an arithmetic number, because the mean of its divisors is an integer number (108376380).

Almost surely, 2^2778981492 is an apocalyptic number.

It is an amenable number.

2778981492 is an abundant number, since it is smaller than the sum of its proper divisors (5024117868).

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

2778981492 is a wasteful number, since it uses less digits than its factorization.

2778981492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163021 (or 163012 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 57.

The square root of 2778981492 is about 52716.0458684071. The cubic root of 2778981492 is about 1405.9241298925.

The spelling of 2778981492 in words is "two billion, seven hundred seventy-eight million, nine hundred eighty-one thousand, four hundred ninety-two".