42078188 has 12 divisors (see below), whose sum is σ = 76176240. Its totient is φ = 20313552.

The previous prime is 42078187. The next prime is 42078233. The reversal of 42078188 is 88187024.

It is a happy number.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (42078181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181256 + ... + 181487.

It is an arithmetic number, because the mean of its divisors is an integer number (6348020).

Almost surely, 2^42078188 is an apocalyptic number.

It is an amenable number.

42078188 is a deficient number, since it is larger than the sum of its proper divisors (34098052).

42078188 is a wasteful number, since it uses less digits than its factorization.

42078188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362776 (or 362774 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 42078188 is about 6486.7702287040. The cubic root of 42078188 is about 347.8182320228.

The spelling of 42078188 in words is "forty-two million, seventy-eight thousand, one hundred eighty-eight".