423636720 has 80 divisors (see below), whose sum is σ = 1414305312. Its totient is φ = 104279040.

The previous prime is 423636679. The next prime is 423636721. The reversal of 423636720 is 27636324.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423636721) 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, 64771 + ... + 71010.

Almost surely, 2^423636720 is an apocalyptic number.

423636720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

423636720 is an abundant number, since it is smaller than the sum of its proper divisors (990668592).

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

423636720 is a wasteful number, since it uses less digits than its factorization.

423636720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135810 (or 135804 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 33.

The square root of 423636720 is about 20582.4371734739. The cubic root of 423636720 is about 751.0425323857.

The spelling of 423636720 in words is "four hundred twenty-three million, six hundred thirty-six thousand, seven hundred twenty".