423534820 has 12 divisors (see below), whose sum is σ = 889423164. Its totient is φ = 169413920.

The previous prime is 423534817. The next prime is 423534823. The reversal of 423534820 is 28435324.

It is an interprime number because it is at equal distance from previous prime (423534817) and next prime (423534823).

It can be written as a sum of positive squares in 2 ways, for example, as 73994404 + 349540416 = 8602^2 + 18696^2 .

It is not an unprimeable number, because it can be changed into a prime (423534823) 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, 10588351 + ... + 10588390.

It is an arithmetic number, because the mean of its divisors is an integer number (74118597).

Almost surely, 2^423534820 is an apocalyptic number.

It is an amenable number.

423534820 is an abundant number, since it is smaller than the sum of its proper divisors (465888344).

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

423534820 is a wasteful number, since it uses less digits than its factorization.

423534820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21176750 (or 21176748 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 423534820 is about 20579.9616131809. The cubic root of 423534820 is about 750.9823098984.

The spelling of 423534820 in words is "four hundred twenty-three million, five hundred thirty-four thousand, eight hundred twenty".