2772420780 has 96 divisors (see below), whose sum is σ = 7967973888. Its totient is φ = 720025600.

The previous prime is 2772420757. The next prime is 2772420857. The reversal of 2772420780 is 870242772.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 349660 + ... + 357500.

It is an arithmetic number, because the mean of its divisors is an integer number (82999728).

Almost surely, 2^2772420780 is an apocalyptic number.

2772420780 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 2772420780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3983986944).

2772420780 is an abundant number, since it is smaller than the sum of its proper divisors (5195553108).

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

2772420780 is a wasteful number, since it uses less digits than its factorization.

2772420780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8007 (or 8005 counting only the distinct ones).

The product of its (nonzero) digits is 87808, while the sum is 39.

The square root of 2772420780 is about 52653.7822003320. The cubic root of 2772420780 is about 1404.8168739260.

The spelling of 2772420780 in words is "two billion, seven hundred seventy-two million, four hundred twenty thousand, seven hundred eighty".