228642789 has 16 divisors (see below), whose sum is σ = 325304000. Its totient is φ = 142425216.

The previous prime is 228642787. The next prime is 228642803. The reversal of 228642789 is 987246822.

It is not a de Polignac number, because 228642789 - 2¹ = 228642787 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 (228642787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23314 + ... + 31635.

It is an arithmetic number, because the mean of its divisors is an integer number (20331500).

Almost surely, 2^228642789 is an apocalyptic number.

It is an amenable number.

228642789 is a deficient number, since it is larger than the sum of its proper divisors (96661211).

228642789 is a wasteful number, since it uses less digits than its factorization.

228642789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55044.

The product of its digits is 774144, while the sum is 48.

The square root of 228642789 is about 15120.9387605400. The cubic root of 228642789 is about 611.4850398162.

The spelling of 228642789 in words is "two hundred twenty-eight million, six hundred forty-two thousand, seven hundred eighty-nine".