423878405988 has 48 divisors (see below), whose sum is σ = 998390005760. Its totient is φ = 139961926944.

The previous prime is 423878405971. The next prime is 423878405989. The reversal of 423878405988 is 889504878324.

423878405988 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×423878405988² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (423878405989) 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, 763653 + ... + 1196211.

Almost surely, 2^423878405988 is an apocalyptic number.

It is an amenable number.

423878405988 is an abundant number, since it is smaller than the sum of its proper divisors (574511599772).

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

423878405988 is a wasteful number, since it uses less digits than its factorization.

423878405988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433336 (or 433334 counting only the distinct ones).

The product of its (nonzero) digits is 123863040, while the sum is 66.

The spelling of 423878405988 in words is "four hundred twenty-three billion, eight hundred seventy-eight million, four hundred five thousand, nine hundred eighty-eight".