228434639 has 4 divisors (see below), whose sum is σ = 228511680. Its totient is φ = 228357600.

The previous prime is 228434623. The next prime is 228434659. The reversal of 228434639 is 936434822.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 228434639 - 2⁴ = 228434623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228434596 and 228434605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228434659) 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, 33887 + ... + 40064.

It is an arithmetic number, because the mean of its divisors is an integer number (57127920).

Almost surely, 2^228434639 is an apocalyptic number.

228434639 is a deficient number, since it is larger than the sum of its proper divisors (77041).

228434639 is an equidigital number, since it uses as much as digits as its factorization.

228434639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77040.

The product of its digits is 248832, while the sum is 41.

The square root of 228434639 is about 15114.0543534817. The cubic root of 228434639 is about 611.2994238526.

The spelling of 228434639 in words is "two hundred twenty-eight million, four hundred thirty-four thousand, six hundred thirty-nine".