2789297280 has 768 divisors, whose sum is σ = 12678681600. Its totient is φ = 547430400.

The previous prime is 2789297257. The next prime is 2789297333. The reversal of 2789297280 is 827929872.

2789297280 is a `hidden beast` number, since 2 + 78 + 9 + 297 + 280 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8426715 + ... + 8427045.

It is an arithmetic number, because the mean of its divisors is an integer number (16508700).

Almost surely, 2^2789297280 is an apocalyptic number.

2789297280 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 2789297280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6339340800).

2789297280 is an abundant number, since it is smaller than the sum of its proper divisors (9889384320).

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

2789297280 is a wasteful number, since it uses less digits than its factorization.

2789297280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393 (or 378 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The square root of 2789297280 is about 52813.7981970621. The cubic root of 2789297280 is about 1407.6616137575.

The spelling of 2789297280 in words is "two billion, seven hundred eighty-nine million, two hundred ninety-seven thousand, two hundred eighty".