442622887 has 4 divisors (see below), whose sum is σ = 505854736. Its totient is φ = 379391040.

The previous prime is 442622881. The next prime is 442622903. The reversal of 442622887 is 788226244.

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

It is not a de Polignac number, because 442622887 - 2²³ = 434234279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442622881) 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, 31615914 + ... + 31615927.

It is an arithmetic number, because the mean of its divisors is an integer number (126463684).

Almost surely, 2^442622887 is an apocalyptic number.

442622887 is a deficient number, since it is larger than the sum of its proper divisors (63231849).

442622887 is an equidigital number, since it uses as much as digits as its factorization.

442622887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63231848.

The product of its digits is 344064, while the sum is 43.

The square root of 442622887 is about 21038.6046828206. The cubic root of 442622887 is about 762.0988194003.

The spelling of 442622887 in words is "four hundred forty-two million, six hundred twenty-two thousand, eight hundred eighty-seven".