2780440872 has 32 divisors (see below), whose sum is σ = 7583021280. Its totient is φ = 842557760.

The previous prime is 2780440853. The next prime is 2780440889.

2780440872 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5265723 + ... + 5266250.

It is an arithmetic number, because the mean of its divisors is an integer number (236969415).

Almost surely, 2^2780440872 is an apocalyptic number.

2780440872 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2780440872 is an abundant number, since it is smaller than the sum of its proper divisors (4802580408).

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

2780440872 is a wasteful number, since it uses less digits than its factorization.

2780440872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10531993 (or 10531989 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 42.

The square root of 2780440872 is about 52729.8859471552. The cubic root of 2780440872 is about 1406.1701934838.

The spelling of 2780440872 in words is "two billion, seven hundred eighty million, four hundred forty thousand, eight hundred seventy-two".