42072188 has 12 divisors (see below), whose sum is σ = 74833752. Its totient is φ = 20691120.

The previous prime is 42072157. The next prime is 42072193. The reversal of 42072188 is 88127024.

42072188 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85970 + ... + 86457.

It is an arithmetic number, because the mean of its divisors is an integer number (6236146).

Almost surely, 2^42072188 is an apocalyptic number.

It is an amenable number.

42072188 is a deficient number, since it is larger than the sum of its proper divisors (32761564).

42072188 is a wasteful number, since it uses less digits than its factorization.

42072188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172492 (or 172490 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 42072188 is about 6486.3077324469. The cubic root of 42072188 is about 347.8016992403.

The spelling of 42072188 in words is "forty-two million, seventy-two thousand, one hundred eighty-eight".