228785492 has 12 divisors (see below), whose sum is σ = 431172756. Its totient is φ = 105593280.

The previous prime is 228785489. The next prime is 228785497. The reversal of 228785492 is 294587822.

It can be written as a sum of positive squares in 2 ways, for example, as 71132356 + 157653136 = 8434^2 + 12556^2 .

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228785497) 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, 2199809 + ... + 2199912.

It is an arithmetic number, because the mean of its divisors is an integer number (35931063).

Almost surely, 2^228785492 is an apocalyptic number.

It is an amenable number.

228785492 is a deficient number, since it is larger than the sum of its proper divisors (202387264).

228785492 is a wasteful number, since it uses less digits than its factorization.

228785492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4399738 (or 4399736 counting only the distinct ones).

The product of its digits is 645120, while the sum is 47.

The square root of 228785492 is about 15125.6567460722. The cubic root of 228785492 is about 611.6122289019.

The spelling of 228785492 in words is "two hundred twenty-eight million, seven hundred eighty-five thousand, four hundred ninety-two".