42189732 has 36 divisors (see below), whose sum is σ = 114851100. Its totient is φ = 12981312.

The previous prime is 42189629. The next prime is 42189743. The reversal of 42189732 is 23798124.

It can be written as a sum of positive squares in 2 ways, for example, as 3326976 + 38862756 = 1824^2 + 6234^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 44607 + ... + 45542.

Almost surely, 2^42189732 is an apocalyptic number.

It is an amenable number.

42189732 is an abundant number, since it is smaller than the sum of its proper divisors (72661368).

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

42189732 is a wasteful number, since it uses less digits than its factorization.

42189732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90172 (or 90167 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 42189732 is about 6495.3623455509. The cubic root of 42189732 is about 348.1253016875.

The spelling of 42189732 in words is "forty-two million, one hundred eighty-nine thousand, seven hundred thirty-two".