442896639 has 4 divisors (see below), whose sum is σ = 590528856. Its totient is φ = 295264424.

The previous prime is 442896617. The next prime is 442896677. The reversal of 442896639 is 936698244.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 442896639 - 2⁷ = 442896511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 442896591 and 442896600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442896739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73816104 + ... + 73816109.

It is an arithmetic number, because the mean of its divisors is an integer number (147632214).

Almost surely, 2^442896639 is an apocalyptic number.

442896639 is a deficient number, since it is larger than the sum of its proper divisors (147632217).

442896639 is a wasteful number, since it uses less digits than its factorization.

442896639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147632216.

The product of its digits is 2239488, while the sum is 51.

The square root of 442896639 is about 21045.1096219526. The cubic root of 442896639 is about 762.2559005084.

The spelling of 442896639 in words is "four hundred forty-two million, eight hundred ninety-six thousand, six hundred thirty-nine".