442878115 has 4 divisors (see below), whose sum is σ = 531453744. Its totient is φ = 354302488.

The previous prime is 442878109. The next prime is 442878127. The reversal of 442878115 is 511878244.

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

It is a cyclic number.

It is not a de Polignac number, because 442878115 - 2¹¹ = 442876067 is a prime.

It is a super-2 number, since 2×442878115² = 392282049491906450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44287807 + ... + 44287816.

It is an arithmetic number, because the mean of its divisors is an integer number (132863436).

Almost surely, 2^442878115 is an apocalyptic number.

442878115 is a deficient number, since it is larger than the sum of its proper divisors (88575629).

442878115 is an equidigital number, since it uses as much as digits as its factorization.

442878115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88575628.

The product of its digits is 71680, while the sum is 40.

The square root of 442878115 is about 21044.6695151052. The cubic root of 442878115 is about 762.2452733297.

The spelling of 442878115 in words is "four hundred forty-two million, eight hundred seventy-eight thousand, one hundred fifteen".