228418939 has 12 divisors (see below), whose sum is σ = 267071904. Its totient is φ = 194785584.

The previous prime is 228418921. The next prime is 228418951. The reversal of 228418939 is 939814822.

It is not a de Polignac number, because 228418939 - 2⁵ = 228418907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228418979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2179 + ... + 21484.

It is an arithmetic number, because the mean of its divisors is an integer number (22255992).

Almost surely, 2^228418939 is an apocalyptic number.

228418939 is a deficient number, since it is larger than the sum of its proper divisors (38652965).

228418939 is a wasteful number, since it uses less digits than its factorization.

228418939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23874 (or 23867 counting only the distinct ones).

The product of its digits is 248832, while the sum is 46.

The square root of 228418939 is about 15113.5349604254. The cubic root of 228418939 is about 611.2854189409.

The spelling of 228418939 in words is "two hundred twenty-eight million, four hundred eighteen thousand, nine hundred thirty-nine".