423228789 has 12 divisors (see below), whose sum is σ = 611529516. Its totient is φ = 282060672.

The previous prime is 423228769. The next prime is 423228791. The reversal of 423228789 is 987822324.

It can be written as a sum of positive squares in 2 ways, for example, as 60326289 + 362902500 = 7767^2 + 19050^2 .

It is not a de Polignac number, because 423228789 - 2¹³ = 423220597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423228739) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32749 + ... + 43805.

It is an arithmetic number, because the mean of its divisors is an integer number (50960793).

Almost surely, 2^423228789 is an apocalyptic number.

It is an amenable number.

423228789 is a deficient number, since it is larger than the sum of its proper divisors (188300727).

423228789 is a wasteful number, since it uses less digits than its factorization.

423228789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15316 (or 15313 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 423228789 is about 20572.5251002399. The cubic root of 423228789 is about 750.8013887298.

The spelling of 423228789 in words is "four hundred twenty-three million, two hundred twenty-eight thousand, seven hundred eighty-nine".