228439757 has 32 divisors (see below), whose sum is σ = 293932800. Its totient is φ = 172666368.

The previous prime is 228439751. The next prime is 228439769. The reversal of 228439757 is 757934822.

It is a happy number.

It is not a de Polignac number, because 228439757 - 2¹⁰ = 228438733 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228439751) 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, 281969 + ... + 282777.

It is an arithmetic number, because the mean of its divisors is an integer number (9185400).

Almost surely, 2^228439757 is an apocalyptic number.

It is an amenable number.

228439757 is a deficient number, since it is larger than the sum of its proper divisors (65493043).

228439757 is a wasteful number, since it uses less digits than its factorization.

228439757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965.

The product of its digits is 846720, while the sum is 47.

The square root of 228439757 is about 15114.2236651440. The cubic root of 228439757 is about 611.3039891367.

The spelling of 228439757 in words is "two hundred twenty-eight million, four hundred thirty-nine thousand, seven hundred fifty-seven".