228538786 has 32 divisors (see below), whose sum is σ = 418148352. Its totient is φ = 91445760.

The previous prime is 228538759. The next prime is 228538819. The reversal of 228538786 is 687835822.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26446 + ... + 34006.

It is an arithmetic number, because the mean of its divisors is an integer number (13067136).

Almost surely, 2^228538786 is an apocalyptic number.

228538786 is a deficient number, since it is larger than the sum of its proper divisors (189609566).

228538786 is a wasteful number, since it uses less digits than its factorization.

228538786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7714.

The product of its digits is 1290240, while the sum is 49.

The square root of 228538786 is about 15117.4993302464. The cubic root of 228538786 is about 611.3923101278.

The spelling of 228538786 in words is "two hundred twenty-eight million, five hundred thirty-eight thousand, seven hundred eighty-six".