442397878 has 8 divisors (see below), whose sum is σ = 714642768. Its totient is φ = 204183624.

The previous prime is 442397821. The next prime is 442397911. The reversal of 442397878 is 878793244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8507626 + ... + 8507677.

It is an arithmetic number, because the mean of its divisors is an integer number (89330346).

Almost surely, 2^442397878 is an apocalyptic number.

442397878 is a deficient number, since it is larger than the sum of its proper divisors (272244890).

442397878 is a wasteful number, since it uses less digits than its factorization.

442397878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17015318.

The product of its digits is 2709504, while the sum is 52.

The square root of 442397878 is about 21033.2564763519. The cubic root of 442397878 is about 761.9696589164.

The spelling of 442397878 in words is "four hundred forty-two million, three hundred ninety-seven thousand, eight hundred seventy-eight".