42436378 has 4 divisors (see below), whose sum is σ = 63654570. Its totient is φ = 21218188.

The previous prime is 42436343. The next prime is 42436397. The reversal of 42436378 is 87363424.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 40411449 + 2024929 = 6357^2 + 1423^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10609093 + ... + 10609096.

Almost surely, 2^42436378 is an apocalyptic number.

42436378 is a deficient number, since it is larger than the sum of its proper divisors (21218192).

42436378 is a wasteful number, since it uses less digits than its factorization.

42436378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21218191.

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

The square root of 42436378 is about 6514.3209930122. The cubic root of 42436378 is about 348.8023774229.

The spelling of 42436378 in words is "forty-two million, four hundred thirty-six thousand, three hundred seventy-eight".