2277280840 has 32 divisors (see below), whose sum is σ = 5138595000. Its totient is φ = 908296704.

The previous prime is 2277280799. The next prime is 2277280861. The reversal of 2277280840 is 480827722.

It can be written as a sum of positive squares in 4 ways, for example, as 1788782436 + 488498404 = 42294^2 + 22102^2 .

It is a super-2 number, since 2×2277280840² = 10372016048462211200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 2277280793 and 2277280802.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67605 + ... + 95524.

Almost surely, 2^2277280840 is an apocalyptic number.

2277280840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2277280840 is an abundant number, since it is smaller than the sum of its proper divisors (2861314160).

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

2277280840 is a wasteful number, since it uses less digits than its factorization.

2277280840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163489 (or 163485 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 40.

The square root of 2277280840 is about 47720.8637809502. The cubic root of 2277280840 is about 1315.6454377508.

The spelling of 2277280840 in words is "two billion, two hundred seventy-seven million, two hundred eighty thousand, eight hundred forty".