2786273280 has 432 divisors, whose sum is σ = 11251536660. Its totient is φ = 635830272.

The previous prime is 2786273251. The next prime is 2786273311. The reversal of 2786273280 is 823726872.

2786273280 is a `hidden beast` number, since 27 + 86 + 273 + 280 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2406491136 + 379782144 = 49056^2 + 19488^2 .

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 35 ways as a sum of consecutive naturals, for example, 4515532 + ... + 4516148.

Almost surely, 2^2786273280 is an apocalyptic number.

2786273280 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 2786273280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5625768330).

2786273280 is an abundant number, since it is smaller than the sum of its proper divisors (8465263380).

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

2786273280 is a wasteful number, since it uses less digits than its factorization.

2786273280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664 (or 634 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 2786273280 is about 52785.1615513299. The cubic root of 2786273280 is about 1407.1527271651.

The spelling of 2786273280 in words is "two billion, seven hundred eighty-six million, two hundred seventy-three thousand, two hundred eighty".