228143793 has 4 divisors (see below), whose sum is σ = 304191728. Its totient is φ = 152095860.

The previous prime is 228143759. The next prime is 228143809. The reversal of 228143793 is 397341822.

228143793 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 228143793 - 2⁸ = 228143537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228143753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38023963 + ... + 38023968.

It is an arithmetic number, because the mean of its divisors is an integer number (76047932).

Almost surely, 2^228143793 is an apocalyptic number.

It is an amenable number.

228143793 is a deficient number, since it is larger than the sum of its proper divisors (76047935).

228143793 is an equidigital number, since it uses as much as digits as its factorization.

228143793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76047934.

The product of its digits is 72576, while the sum is 39.

The square root of 228143793 is about 15104.4295820796. The cubic root of 228143793 is about 611.0398755007.

The spelling of 228143793 in words is "two hundred twenty-eight million, one hundred forty-three thousand, seven hundred ninety-three".