27728762238 has 40 divisors (see below), whose sum is σ = 62205611160. Its totient is φ = 9232114320.

The previous prime is 27728762227. The next prime is 27728762249. The reversal of 27728762238 is 83226782772.

27728762238 is a `hidden beast` number, since 2 + 7 + 7 + 2 + 8 + 7 + 622 + 3 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (27728762227) and next prime (27728762249).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 39528 + ... + 238788.

It is an arithmetic number, because the mean of its divisors is an integer number (1555140279).

Almost surely, 2^27728762238 is an apocalyptic number.

27728762238 is an abundant number, since it is smaller than the sum of its proper divisors (34476848922).

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

27728762238 is a wasteful number, since it uses less digits than its factorization.

27728762238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200134 (or 200125 counting only the distinct ones).

The product of its digits is 6322176, while the sum is 54.

The spelling of 27728762238 in words is "twenty-seven billion, seven hundred twenty-eight million, seven hundred sixty-two thousand, two hundred thirty-eight".