2281728920 has 16 divisors (see below), whose sum is σ = 5133890160. Its totient is φ = 912691552.

The previous prime is 2281728919. The next prime is 2281728923. The reversal of 2281728920 is 298271822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2281728923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28521572 + ... + 28521651.

It is an arithmetic number, because the mean of its divisors is an integer number (320868135).

Almost surely, 2^2281728920 is an apocalyptic number.

2281728920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2281728920 is an abundant number, since it is smaller than the sum of its proper divisors (2852161240).

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

2281728920 is a wasteful number, since it uses less digits than its factorization.

2281728920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57043234 (or 57043230 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 2281728920 is about 47767.4462369510. The cubic root of 2281728920 is about 1316.5014718419.

The spelling of 2281728920 in words is "two billion, two hundred eighty-one million, seven hundred twenty-eight thousand, nine hundred twenty".