2779923864 has 32 divisors (see below), whose sum is σ = 6957054720. Its totient is φ = 925675296.

The previous prime is 2779923859. The next prime is 2779923869. The reversal of 2779923864 is 4683299772.

It is an interprime number because it is at equal distance from previous prime (2779923859) and next prime (2779923869).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2779923869) 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, 36684 + ... + 83099.

It is an arithmetic number, because the mean of its divisors is an integer number (217407960).

Almost surely, 2^2779923864 is an apocalyptic number.

2779923864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2779923864 is an abundant number, since it is smaller than the sum of its proper divisors (4177130856).

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

2779923864 is a wasteful number, since it uses less digits than its factorization.

2779923864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120759 (or 120755 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 57.

The square root of 2779923864 is about 52724.9833001396. The cubic root of 2779923864 is about 1406.0830314907.

The spelling of 2779923864 in words is "two billion, seven hundred seventy-nine million, nine hundred twenty-three thousand, eight hundred sixty-four".