228506838 has 16 divisors (see below), whose sum is σ = 522301440. Its totient is φ = 65287656.

The previous prime is 228506833. The next prime is 228506851. The reversal of 228506838 is 838605822.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 5440639 = 228506838 / (2 + 2 + 8 + 5 + 0 + 6 + 8 + 3 + 8).

It is a self number, because there is not a number n which added to its sum of digits gives 228506838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228506833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2720278 + ... + 2720361.

It is an arithmetic number, because the mean of its divisors is an integer number (32643840).

Almost surely, 2^228506838 is an apocalyptic number.

228506838 is an abundant number, since it is smaller than the sum of its proper divisors (293794602).

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

228506838 is a wasteful number, since it uses less digits than its factorization.

228506838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5440651.

The product of its (nonzero) digits is 184320, while the sum is 42.

The square root of 228506838 is about 15116.4426370757. The cubic root of 228506838 is about 611.3638194543.

The spelling of 228506838 in words is "two hundred twenty-eight million, five hundred six thousand, eight hundred thirty-eight".