228156588 has 96 divisors (see below), whose sum is σ = 653533440. Its totient is φ = 69109200.

The previous prime is 228156587. The next prime is 228156589. The reversal of 228156588 is 885651822.

228156588 is a `hidden beast` number, since 2 + 2 + 8 + 1 + 565 + 88 = 666.

228156588 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (228156587) and next prime (228156589).

It is not an unprimeable number, because it can be changed into a prime (228156587) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95043 + ... + 97413.

It is an arithmetic number, because the mean of its divisors is an integer number (6807640).

Almost surely, 2^228156588 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 228156588, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326766720).

228156588 is an abundant number, since it is smaller than the sum of its proper divisors (425376852).

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

228156588 is a wasteful number, since it uses less digits than its factorization.

228156588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407 (or 2387 counting only the distinct ones).

The product of its digits is 307200, while the sum is 45.

The square root of 228156588 is about 15104.8531273892. The cubic root of 228156588 is about 611.0512982807.

It can be divided in two parts, 22815 and 6588, that added together give a triangular number (29403 = T₂₄₂).

The spelling of 228156588 in words is "two hundred twenty-eight million, one hundred fifty-six thousand, five hundred eighty-eight".