423999432 has 24 divisors (see below), whose sum is σ = 1148331990. Its totient is φ = 141333120.

The previous prime is 423999419. The next prime is 423999439. The reversal of 423999432 is 234999324.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 274034916 + 149964516 = 16554^2 + 12246^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (423999439) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2944369 + ... + 2944512.

Almost surely, 2^423999432 is an apocalyptic number.

It is an amenable number.

423999432 is an abundant number, since it is smaller than the sum of its proper divisors (724332558).

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

423999432 is a wasteful number, since it uses less digits than its factorization.

423999432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5888893 (or 5888886 counting only the distinct ones).

The product of its digits is 419904, while the sum is 45.

The square root of 423999432 is about 20591.2464897101. The cubic root of 423999432 is about 751.2568153770.

The spelling of 423999432 in words is "four hundred twenty-three million, nine hundred ninety-nine thousand, four hundred thirty-two".