228272187 has 54 divisors (see below), whose sum is σ = 368297748. Its totient is φ = 125611200.

The previous prime is 228272179. The next prime is 228272207. The reversal of 228272187 is 781272822.

It is not a de Polignac number, because 228272187 - 2³ = 228272179 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (228272147) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 3742137 + ... + 3742197.

Almost surely, 2^228272187 is an apocalyptic number.

228272187 is a deficient number, since it is larger than the sum of its proper divisors (140025561).

228272187 is a wasteful number, since it uses less digits than its factorization.

228272187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173 (or 88 counting only the distinct ones).

The product of its digits is 50176, while the sum is 39.

The square root of 228272187 is about 15108.6791944233. The cubic root of 228272187 is about 611.1544803295.

The spelling of 228272187 in words is "two hundred twenty-eight million, two hundred seventy-two thousand, one hundred eighty-seven".