442143404 has 24 divisors (see below), whose sum is σ = 788686080. Its totient is φ = 216822096.

The previous prime is 442143389. The next prime is 442143431. The reversal of 442143404 is 404341244.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113009 + ... + 116855.

It is an arithmetic number, because the mean of its divisors is an integer number (32861920).

Almost surely, 2^442143404 is an apocalyptic number.

It is an amenable number.

442143404 is a deficient number, since it is larger than the sum of its proper divisors (346542676).

442143404 is a wasteful number, since it uses less digits than its factorization.

442143404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4397 (or 4395 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 442143404 is about 21027.2062813870. The cubic root of 442143404 is about 761.8235320422.

Adding to 442143404 its reverse (404341244), we get a palindrome (846484648).

The spelling of 442143404 in words is "four hundred forty-two million, one hundred forty-three thousand, four hundred four".