442878 has 16 divisors (see below), whose sum is σ = 892416. Its totient is φ = 146520.

The previous prime is 442861. The next prime is 442879. The reversal of 442878 is 878244.

It is a super-2 number, since 2×442878² = 392281845768, which contains 22 as substring.

It is an Ulam number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442879) 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, 1173 + ... + 1503.

It is an arithmetic number, because the mean of its divisors is an integer number (55776).

2⁴⁴²⁸⁷⁸ is an apocalyptic number.

442878 is an abundant number, since it is smaller than the sum of its proper divisors (449538).

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

442878 is a wasteful number, since it uses less digits than its factorization.

442878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559.

The product of its digits is 14336, while the sum is 33.

The square root of 442878 is about 665.4907963300. The cubic root of 442878 is about 76.2245207354.

The spelling of 442878 in words is "four hundred forty-two thousand, eight hundred seventy-eight".