27229991238 has 16 divisors (see below), whose sum is σ = 60511091760. Its totient is φ = 9076663728.

The previous prime is 27229991221. The next prime is 27229991317. The reversal of 27229991238 is 83219992272.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 504259097 = 27229991238 / (2 + 7 + 2 + 2 + 9 + 9 + 9 + 1 + 2 + 3 + 8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252129495 + ... + 252129602.

It is an arithmetic number, because the mean of its divisors is an integer number (3781943235).

Almost surely, 2^27229991238 is an apocalyptic number.

27229991238 is an abundant number, since it is smaller than the sum of its proper divisors (33281100522).

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

27229991238 is a wasteful number, since it uses less digits than its factorization.

27229991238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504259108 (or 504259102 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The spelling of 27229991238 in words is "twenty-seven billion, two hundred twenty-nine million, nine hundred ninety-one thousand, two hundred thirty-eight".