442578678 has 16 divisors (see below), whose sum is σ = 885385200. Its totient is φ = 147488256.

The previous prime is 442578677. The next prime is 442578691. The reversal of 442578678 is 876875244.

It is a self number, because there is not a number n which added to its sum of digits gives 442578678.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442578677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25926 + ... + 39462.

It is an arithmetic number, because the mean of its divisors is an integer number (55336575).

Almost surely, 2^442578678 is an apocalyptic number.

442578678 is an abundant number, since it is smaller than the sum of its proper divisors (442806522).

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

442578678 is a wasteful number, since it uses less digits than its factorization.

442578678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18991.

The product of its digits is 3010560, while the sum is 51.

The square root of 442578678 is about 21037.5539928006. The cubic root of 442578678 is about 762.0734458453.

The spelling of 442578678 in words is "four hundred forty-two million, five hundred seventy-eight thousand, six hundred seventy-eight".