228013439 has 4 divisors (see below), whose sum is σ = 228048720. Its totient is φ = 227978160.

The previous prime is 228013427. The next prime is 228013441. The reversal of 228013439 is 934310822.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 934310822 = 2 ⋅467155411.

It is a cyclic number.

It is not a de Polignac number, because 228013439 - 2⁸ = 228013183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228019439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4859 + ... + 21900.

It is an arithmetic number, because the mean of its divisors is an integer number (57012180).

Almost surely, 2^228013439 is an apocalyptic number.

228013439 is a deficient number, since it is larger than the sum of its proper divisors (35281).

228013439 is an equidigital number, since it uses as much as digits as its factorization.

228013439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35280.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 228013439 is about 15100.1138737428. The cubic root of 228013439 is about 610.9234771746.

The spelling of 228013439 in words is "two hundred twenty-eight million, thirteen thousand, four hundred thirty-nine".