2780264220 has 96 divisors (see below), whose sum is σ = 8089804800. Its totient is φ = 712583424.

The previous prime is 2780264183. The next prime is 2780264231. The reversal of 2780264220 is 224620872.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 391461 + ... + 398499.

It is an arithmetic number, because the mean of its divisors is an integer number (84268800).

Almost surely, 2^2780264220 is an apocalyptic number.

2780264220 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 2780264220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4044902400).

2780264220 is an abundant number, since it is smaller than the sum of its proper divisors (5309540580).

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

2780264220 is a wasteful number, since it uses less digits than its factorization.

2780264220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7307 (or 7305 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 2780264220 is about 52728.2108552907. The cubic root of 2780264220 is about 1406.1404130702.

The spelling of 2780264220 in words is "two billion, seven hundred eighty million, two hundred sixty-four thousand, two hundred twenty".