2779289140 has 48 divisors (see below), whose sum is σ = 6006067200. Its totient is φ = 1079665920.

The previous prime is 2779289089. The next prime is 2779289141. The reversal of 2779289140 is 419829772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2779289141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175261 + ... + 190459.

It is an arithmetic number, because the mean of its divisors is an integer number (125126400).

Almost surely, 2^2779289140 is an apocalyptic number.

2779289140 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 2779289140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3003033600).

2779289140 is an abundant number, since it is smaller than the sum of its proper divisors (3226778060).

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

2779289140 is a wasteful number, since it uses less digits than its factorization.

2779289140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15472 (or 15470 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 49.

The square root of 2779289140 is about 52718.9637606810. The cubic root of 2779289140 is about 1405.9760090657.

The spelling of 2779289140 in words is "two billion, seven hundred seventy-nine million, two hundred eighty-nine thousand, one hundred forty".