228128593 has 32 divisors (see below), whose sum is σ = 306194688. Its totient is φ = 164505600.

The previous prime is 228128543. The next prime is 228128617. The reversal of 228128593 is 395821822.

It is not a de Polignac number, because 228128593 - 2⁹ = 228128081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228128503) 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, 78421 + ... + 81277.

It is an arithmetic number, because the mean of its divisors is an integer number (9568584).

Almost surely, 2^228128593 is an apocalyptic number.

It is an amenable number.

228128593 is a deficient number, since it is larger than the sum of its proper divisors (78066095).

228128593 is a wasteful number, since it uses less digits than its factorization.

228128593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2953.

The product of its digits is 69120, while the sum is 40.

The square root of 228128593 is about 15103.9264100432. The cubic root of 228128593 is about 611.0263050937.

It can be divided in two parts, 228 and 128593, that added together give a palindrome (128821).

The spelling of 228128593 in words is "two hundred twenty-eight million, one hundred twenty-eight thousand, five hundred ninety-three".