423899988 has 12 divisors (see below), whose sum is σ = 989100000. Its totient is φ = 141299992.

The previous prime is 423899923. The next prime is 423899999. The reversal of 423899988 is 889998324.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17662488 + ... + 17662511.

It is an arithmetic number, because the mean of its divisors is an integer number (82425000).

Almost surely, 2^423899988 is an apocalyptic number.

It is an amenable number.

423899988 is an abundant number, since it is smaller than the sum of its proper divisors (565200012).

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

423899988 is a wasteful number, since it uses less digits than its factorization.

423899988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35325006 (or 35325004 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 60.

The square root of 423899988 is about 20588.8316327081. The cubic root of 423899988 is about 751.1980780152.

The spelling of 423899988 in words is "four hundred twenty-three million, eight hundred ninety-nine thousand, nine hundred eighty-eight".