227926991889 has 27 divisors (see below), whose sum is σ = 331131755227. Its totient is φ = 151077654816.

The previous prime is 227926991857. The next prime is 227926991909. The reversal of 227926991889 is 988199629722.

The square root of 227926991889 is 477417.

It is a perfect power (a square), and thus also a powerful number.

227926991889 is a `hidden beast` number, since 2 + 279 + 269 + 9 + 18 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 46287371025 + 181639620864 = 215145^2 + 426192^2 .

It is not a de Polignac number, because 227926991889 - 2⁵ = 227926991857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (227926991839) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 333714142 + ... + 333714824.

Almost surely, 2^227926991889 is an apocalyptic number.

227926991889 is the 477417-th square number.

227926991889 is the 238709-th centered octagonal number.

It is an amenable number.

227926991889 is a deficient number, since it is larger than the sum of its proper divisors (103204763338).

227926991889 is an frugal number, since it uses more digits than its factorization.

227926991889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1838 (or 919 counting only the distinct ones).

The product of its digits is 141087744, while the sum is 72.

The spelling of 227926991889 in words is "two hundred twenty-seven billion, nine hundred twenty-six million, nine hundred ninety-one thousand, eight hundred eighty-nine".