42378436 has 12 divisors (see below), whose sum is σ = 78065680. Its totient is φ = 20073960.

The previous prime is 42378407. The next prime is 42378439. The reversal of 42378436 is 63487324.

It is a happy number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 42378395 and 42378404.

It is not an unprimeable number, because it can be changed into a prime (42378439) 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, 278730 + ... + 278881.

Almost surely, 2^42378436 is an apocalyptic number.

It is an amenable number.

42378436 is a deficient number, since it is larger than the sum of its proper divisors (35687244).

42378436 is a wasteful number, since it uses less digits than its factorization.

42378436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557634 (or 557632 counting only the distinct ones).

The product of its digits is 96768, while the sum is 37.

The square root of 42378436 is about 6509.8721953661. The cubic root of 42378436 is about 348.6435552553.

The spelling of 42378436 in words is "forty-two million, three hundred seventy-eight thousand, four hundred thirty-six".