42378192 has 30 divisors (see below), whose sum is σ = 118600482. Its totient is φ = 14126016.

The previous prime is 42378191. The next prime is 42378211. The reversal of 42378192 is 29187324.

It can be written as a sum of positive squares in only one way, i.e., 42302016 + 76176 = 6504^2 + 276^2 .

It is a super-2 number, since 2×42378192² = 3591822314377728, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42378191) 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 5 ways as a sum of consecutive naturals, for example, 147003 + ... + 147290.

Almost surely, 2^42378192 is an apocalyptic number.

It is an amenable number.

42378192 is an abundant number, since it is smaller than the sum of its proper divisors (76222290).

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

42378192 is a wasteful number, since it uses less digits than its factorization.

42378192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294307 (or 294298 counting only the distinct ones).

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

The square root of 42378192 is about 6509.8534545718. The cubic root of 42378192 is about 348.6428861320.

The spelling of 42378192 in words is "forty-two million, three hundred seventy-eight thousand, one hundred ninety-two".