228111372 has 72 divisors (see below), whose sum is σ = 625493232. Its totient is φ = 69811200.

The previous prime is 228111329. The next prime is 228111379. The reversal of 228111372 is 273111822.

228111372 is a `hidden beast` number, since 2 + 281 + 11 + 372 = 666.

It is not an unprimeable number, because it can be changed into a prime (228111379) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20547 + ... + 29637.

It is an arithmetic number, because the mean of its divisors is an integer number (8687406).

Almost surely, 2^228111372 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228111372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312746616).

228111372 is an abundant number, since it is smaller than the sum of its proper divisors (397381860).

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

228111372 is a wasteful number, since it uses less digits than its factorization.

228111372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9159 (or 9154 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 228111372 is about 15103.3563157333. The cubic root of 228111372 is about 611.0109296298.

The spelling of 228111372 in words is "two hundred twenty-eight million, one hundred eleven thousand, three hundred seventy-two".