2784440880 has 640 divisors, whose sum is σ = 11549260800. Its totient is φ = 609140736.

The previous prime is 2784440851. The next prime is 2784440903. The reversal of 2784440880 is 880444872.

It is a happy number.

2784440880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2784440880² = 15506222028430348800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 9069687 + ... + 9069993.

It is an arithmetic number, because the mean of its divisors is an integer number (18045720).

Almost surely, 2^2784440880 is an apocalyptic number.

2784440880 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 2784440880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5774630400).

2784440880 is an abundant number, since it is smaller than the sum of its proper divisors (8764819920).

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

2784440880 is a wasteful number, since it uses less digits than its factorization.

2784440880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378 (or 366 counting only the distinct ones).

The product of its (nonzero) digits is 458752, while the sum is 45.

The square root of 2784440880 is about 52767.8015460186. The cubic root of 2784440880 is about 1406.8441869455.

The spelling of 2784440880 in words is "two billion, seven hundred eighty-four million, four hundred forty thousand, eight hundred eighty".