442868819 has 8 divisors (see below), whose sum is σ = 475525728. Its totient is φ = 410945920.

The previous prime is 442868779. The next prime is 442868837. The reversal of 442868819 is 918868244.

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

It is a cyclic number.

It is not a de Polignac number, because 442868819 - 2⁸ = 442868563 is a prime.

It is a super-2 number, since 2×442868819² = 392265581684909522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442868869) 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, 182252 + ... + 184665.

It is an arithmetic number, because the mean of its divisors is an integer number (59440716).

Almost surely, 2^442868819 is an apocalyptic number.

442868819 is a deficient number, since it is larger than the sum of its proper divisors (32656909).

442868819 is a wasteful number, since it uses less digits than its factorization.

442868819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367005.

The product of its digits is 884736, while the sum is 50.

The square root of 442868819 is about 21044.4486504161. The cubic root of 442868819 is about 762.2399401230.

The spelling of 442868819 in words is "four hundred forty-two million, eight hundred sixty-eight thousand, eight hundred nineteen".