228838709 has 12 divisors (see below), whose sum is σ = 251899872. Its totient is φ = 207732360.

The previous prime is 228838699. The next prime is 228838741. The reversal of 228838709 is 907838822.

It is not a de Polignac number, because 228838709 - 2⁸ = 228838453 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 (228838759) 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, 157424 + ... + 158870.

It is an arithmetic number, because the mean of its divisors is an integer number (20991656).

Almost surely, 2^228838709 is an apocalyptic number.

It is an amenable number.

228838709 is a deficient number, since it is larger than the sum of its proper divisors (23061163).

228838709 is a wasteful number, since it uses less digits than its factorization.

228838709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2776 (or 2765 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 228838709 is about 15127.4158070703. The cubic root of 228838709 is about 611.6596468922.

The spelling of 228838709 in words is "two hundred twenty-eight million, eight hundred thirty-eight thousand, seven hundred nine".