228137868 has 72 divisors (see below), whose sum is σ = 663001248. Its totient is φ = 64793088.

The previous prime is 228137863. The next prime is 228137869. The reversal of 228137868 is 868731822.

228137868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (228137863) 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, 40980 + ... + 46212.

Almost surely, 2^228137868 is an apocalyptic number.

228137868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228137868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331500624).

228137868 is an abundant number, since it is smaller than the sum of its proper divisors (434863380).

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

228137868 is a wasteful number, since it uses less digits than its factorization.

228137868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5423 (or 5418 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 228137868 is about 15104.2334462892. The cubic root of 228137868 is about 611.0345857920.

The spelling of 228137868 in words is "two hundred twenty-eight million, one hundred thirty-seven thousand, eight hundred sixty-eight".