228861187 has 8 divisors (see below), whose sum is σ = 233632512. Its totient is φ = 224133000.

The previous prime is 228861167. The next prime is 228861211. The reversal of 228861187 is 781168822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 228861187 - 2²³ = 220472579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228861167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48 + ... + 21394.

It is an arithmetic number, because the mean of its divisors is an integer number (29204064).

Almost surely, 2^228861187 is an apocalyptic number.

228861187 is a deficient number, since it is larger than the sum of its proper divisors (4771325).

228861187 is a wasteful number, since it uses less digits than its factorization.

228861187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21569.

The product of its digits is 86016, while the sum is 43.

The square root of 228861187 is about 15128.1587445399. The cubic root of 228861187 is about 611.6796732759.

The spelling of 228861187 in words is "two hundred twenty-eight million, eight hundred sixty-one thousand, one hundred eighty-seven".