2271078720 has 84 divisors (see below), whose sum is σ = 7811574420. Its totient is φ = 605620224.

The previous prime is 2271078713. The next prime is 2271078731. The reversal of 2271078720 is 278701722.

It can be written as a sum of positive squares in 2 ways, for example, as 1806590016 + 464488704 = 42504^2 + 21552^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 391405 + ... + 397164.

Almost surely, 2^2271078720 is an apocalyptic number.

2271078720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2271078720 is an abundant number, since it is smaller than the sum of its proper divisors (5540495700).

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

2271078720 is a wasteful number, since it uses less digits than its factorization.

2271078720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788592 (or 788579 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 36.

The square root of 2271078720 is about 47655.8361588589. The cubic root of 2271078720 is about 1314.4499755088.

The spelling of 2271078720 in words is "two billion, two hundred seventy-one million, seventy-eight thousand, seven hundred twenty".