228407838 has 8 divisors (see below), whose sum is σ = 456815688. Its totient is φ = 76135944.

The previous prime is 228407833. The next prime is 228407863. The reversal of 228407838 is 838704822.

It is a sphenic number, since it is the product of 3 distinct primes.

228407838 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 228407838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228407833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19033981 + ... + 19033992.

It is an arithmetic number, because the mean of its divisors is an integer number (57101961).

Almost surely, 2^228407838 is an apocalyptic number.

228407838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228407838 is a wasteful number, since it uses less digits than its factorization.

228407838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38067978.

The product of its (nonzero) digits is 172032, while the sum is 42.

The square root of 228407838 is about 15113.1677023713. The cubic root of 228407838 is about 611.2755160998.

The spelling of 228407838 in words is "two hundred twenty-eight million, four hundred seven thousand, eight hundred thirty-eight".