228142188 has 36 divisors (see below), whose sum is σ = 596581440. Its totient is φ = 73424736.

The previous prime is 228142171. The next prime is 228142249. The reversal of 228142188 is 881241822.

228142188 is a `hidden beast` number, since 228 + 1 + 421 + 8 + 8 = 666.

228142188 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108220 + ... + 110307.

Almost surely, 2^228142188 is an apocalyptic number.

It is an amenable number.

228142188 is an abundant number, since it is smaller than the sum of its proper divisors (368439252).

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

228142188 is a wasteful number, since it uses less digits than its factorization.

228142188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218566 (or 218561 counting only the distinct ones).

The product of its digits is 16384, while the sum is 36.

The square root of 228142188 is about 15104.3764518765. The cubic root of 228142188 is about 611.0384426013.

The spelling of 228142188 in words is "two hundred twenty-eight million, one hundred forty-two thousand, one hundred eighty-eight".