228364920 has 160 divisors (see below), whose sum is σ = 877298400. Its totient is φ = 52192512.

The previous prime is 228364909. The next prime is 228364921. The reversal of 228364920 is 29463822.

228364920 is a `hidden beast` number, since 2 + 2 + 8 + 3 + 649 + 2 + 0 = 666.

228364920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228364921) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17646 + ... + 27714.

It is an arithmetic number, because the mean of its divisors is an integer number (5483115).

Almost surely, 2^228364920 is an apocalyptic number.

228364920 is a gapful number since it is divisible by the number (20) 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 228364920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (438649200).

228364920 is an abundant number, since it is smaller than the sum of its proper divisors (648933480).

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

228364920 is a wasteful number, since it uses less digits than its factorization.

228364920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10099 (or 10086 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 228364920 is about 15111.7477480270. The cubic root of 228364920 is about 611.2372273292.

The spelling of 228364920 in words is "two hundred twenty-eight million, three hundred sixty-four thousand, nine hundred twenty".