42431988 has 24 divisors (see below), whose sum is σ = 102422880. Its totient is φ = 13656160.

The previous prime is 42431981. The next prime is 42431999. The reversal of 42431988 is 88913424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42431981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60618 + ... + 61313.

It is an arithmetic number, because the mean of its divisors is an integer number (4267620).

Almost surely, 2^42431988 is an apocalyptic number.

It is an amenable number.

42431988 is an abundant number, since it is smaller than the sum of its proper divisors (59990892).

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

42431988 is a wasteful number, since it uses less digits than its factorization.

42431988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121967 (or 121965 counting only the distinct ones).

The product of its digits is 55296, while the sum is 39.

The square root of 42431988 is about 6513.9840343679. The cubic root of 42431988 is about 348.7903492581.

The spelling of 42431988 in words is "forty-two million, four hundred thirty-one thousand, nine hundred eighty-eight".