2304728181 has 48 divisors (see below), whose sum is σ = 3977961600. Its totient is φ = 1314968256.

The previous prime is 2304728171. The next prime is 2304728189. The reversal of 2304728181 is 1818274032.

2304728181 is a `hidden beast` number, since 2 + 3 + 0 + 472 + 8 + 181 = 666.

It is not a de Polignac number, because 2304728181 - 2⁵ = 2304728149 is a prime.

It is a super-2 number, since 2×2304728181² = 10623543976591137522, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2304728189) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1492896 + ... + 1494438.

It is an arithmetic number, because the mean of its divisors is an integer number (82874200).

Almost surely, 2^2304728181 is an apocalyptic number.

2304728181 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2304728181 is a deficient number, since it is larger than the sum of its proper divisors (1673233419).

2304728181 is a wasteful number, since it uses less digits than its factorization.

2304728181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2695 (or 2682 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 2304728181 is about 48007.5846195161. The cubic root of 2304728181 is about 1320.9100284598.

The spelling of 2304728181 in words is "two billion, three hundred four million, seven hundred twenty-eight thousand, one hundred eighty-one".