2281738728 has 32 divisors (see below), whose sum is σ = 6004576800. Its totient is φ = 720548928.

The previous prime is 2281738721. The next prime is 2281738783. The reversal of 2281738728 is 8278371822.

It is not an unprimeable number, because it can be changed into a prime (2281738721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2501451 + ... + 2502362.

It is an arithmetic number, because the mean of its divisors is an integer number (187643025).

Almost surely, 2^2281738728 is an apocalyptic number.

It is an amenable number.

2281738728 is an abundant number, since it is smaller than the sum of its proper divisors (3722838072).

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

2281738728 is a wasteful number, since it uses less digits than its factorization.

2281738728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5003841 (or 5003837 counting only the distinct ones).

The product of its digits is 602112, while the sum is 48.

The square root of 2281738728 is about 47767.5489009013. The cubic root of 2281738728 is about 1316.5033581641.

The spelling of 2281738728 in words is "two billion, two hundred eighty-one million, seven hundred thirty-eight thousand, seven hundred twenty-eight".