228374639 has 4 divisors (see below), whose sum is σ = 228407400. Its totient is φ = 228341880.

The previous prime is 228374611. The next prime is 228374669. The reversal of 228374639 is 936473822.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 228374639 - 2¹² = 228370543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 228374639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228374669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1289 + ... + 21410.

It is an arithmetic number, because the mean of its divisors is an integer number (57101850).

Almost surely, 2^228374639 is an apocalyptic number.

228374639 is a deficient number, since it is larger than the sum of its proper divisors (32761).

228374639 is a wasteful number, since it uses less digits than its factorization.

228374639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32760.

The product of its digits is 435456, while the sum is 44.

The square root of 228374639 is about 15112.0693156166. The cubic root of 228374639 is about 611.2458984367.

The spelling of 228374639 in words is "two hundred twenty-eight million, three hundred seventy-four thousand, six hundred thirty-nine".