228127861 has 12 divisors (see below), whose sum is σ = 251086980. Its totient is φ = 207118080.

The previous prime is 228127843. The next prime is 228127877. The reversal of 228127861 is 168721822.

It can be written as a sum of positive squares in 6 ways, for example, as 34751025 + 193376836 = 5895^2 + 13906^2 .

It is not a de Polignac number, because 228127861 - 2¹¹ = 228125813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228127861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228127841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 756 + ... + 21373.

It is an arithmetic number, because the mean of its divisors is an integer number (20923915).

Almost surely, 2^228127861 is an apocalyptic number.

It is an amenable number.

228127861 is a deficient number, since it is larger than the sum of its proper divisors (22959119).

228127861 is a wasteful number, since it uses less digits than its factorization.

228127861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22216 (or 22203 counting only the distinct ones).

The product of its digits is 21504, while the sum is 37.

The square root of 228127861 is about 15103.9021779142. The cubic root of 228127861 is about 611.0256515562.

The spelling of 228127861 in words is "two hundred twenty-eight million, one hundred twenty-seven thousand, eight hundred sixty-one".