228135872 has 14 divisors (see below), whose sum is σ = 452707248. Its totient is φ = 114067904.

The previous prime is 228135847. The next prime is 228135881. The reversal of 228135872 is 278531822.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1782248 + ... + 1782375.

It is an arithmetic number, because the mean of its divisors is an integer number (32336232).

Almost surely, 2^228135872 is an apocalyptic number.

It is an amenable number.

228135872 is a deficient number, since it is larger than the sum of its proper divisors (224571376).

228135872 is an equidigital number, since it uses as much as digits as its factorization.

228135872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3564635 (or 3564625 counting only the distinct ones).

The product of its digits is 53760, while the sum is 38.

The square root of 228135872 is about 15104.1673719540. The cubic root of 228135872 is about 611.0328037868.

The spelling of 228135872 in words is "two hundred twenty-eight million, one hundred thirty-five thousand, eight hundred seventy-two".