423817428 has 12 divisors (see below), whose sum is σ = 988907360. Its totient is φ = 141272472.

The previous prime is 423817423. The next prime is 423817453. The reversal of 423817428 is 824718324.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423817423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17659048 + ... + 17659071.

Almost surely, 2^423817428 is an apocalyptic number.

It is an amenable number.

423817428 is an abundant number, since it is smaller than the sum of its proper divisors (565089932).

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

423817428 is a wasteful number, since it uses less digits than its factorization.

423817428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35318126 (or 35318124 counting only the distinct ones).

The product of its digits is 86016, while the sum is 39.

The square root of 423817428 is about 20586.8265645776. The cubic root of 423817428 is about 751.1493063381.

The spelling of 423817428 in words is "four hundred twenty-three million, eight hundred seventeen thousand, four hundred twenty-eight".