228521088 has 224 divisors, whose sum is σ = 713510400. Its totient is φ = 72783360.

The previous prime is 228521023. The next prime is 228521099. The reversal of 228521088 is 880125822.

It is a happy number.

228521088 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 an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 2892633 + ... + 2892711.

Almost surely, 2^228521088 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 228521088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (356755200).

228521088 is an abundant number, since it is smaller than the sum of its proper divisors (484989312).

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

228521088 is an frugal number, since it uses more digits than its factorization.

228521088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 228521088 is about 15116.9139707812. The cubic root of 228521088 is about 611.3765276858.

The spelling of 228521088 in words is "two hundred twenty-eight million, five hundred twenty-one thousand, eighty-eight".