42181932 has 48 divisors (see below), whose sum is σ = 107815680. Its totient is φ = 12756288.

The previous prime is 42181903. The next prime is 42181939. The reversal of 42181932 is 23918124.

It is a self number, because there is not a number n which added to its sum of digits gives 42181932.

It is not an unprimeable number, because it can be changed into a prime (42181939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6913 + ... + 11495.

It is an arithmetic number, because the mean of its divisors is an integer number (2246160).

Almost surely, 2^42181932 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42181932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53907840).

42181932 is an abundant number, since it is smaller than the sum of its proper divisors (65633748).

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

42181932 is a wasteful number, since it uses less digits than its factorization.

42181932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4662 (or 4660 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 42181932 is about 6494.7618893998. The cubic root of 42181932 is about 348.1038466669.

The spelling of 42181932 in words is "forty-two million, one hundred eighty-one thousand, nine hundred thirty-two".