228870432 has 144 divisors (see below), whose sum is σ = 751488192. Its totient is φ = 64719360.

The previous prime is 228870431. The next prime is 228870449. The reversal of 228870432 is 234078822.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is not an unprimeable number, because it can be changed into a prime (228870431) 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, 215182 + ... + 216242.

It is an arithmetic number, because the mean of its divisors is an integer number (5218668).

Almost surely, 2^228870432 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 228870432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (375744096).

228870432 is an abundant number, since it is smaller than the sum of its proper divisors (522617760).

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

228870432 is a wasteful number, since it uses less digits than its factorization.

228870432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191 (or 1180 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 228870432 is about 15128.4642974758. The cubic root of 228870432 is about 611.6879095675.

The spelling of 228870432 in words is "two hundred twenty-eight million, eight hundred seventy thousand, four hundred thirty-two".