442648287 has 32 divisors (see below), whose sum is σ = 678912000. Its totient is φ = 284744160.

The previous prime is 442648253. The next prime is 442648333. The reversal of 442648287 is 782846244.

It is not a de Polignac number, because 442648287 - 2⁶ = 442648223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442648207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 425514 + ... + 426552.

It is an arithmetic number, because the mean of its divisors is an integer number (21216000).

Almost surely, 2^442648287 is an apocalyptic number.

442648287 is a deficient number, since it is larger than the sum of its proper divisors (236263713).

442648287 is a wasteful number, since it uses less digits than its factorization.

442648287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588 (or 1582 counting only the distinct ones).

The product of its digits is 688128, while the sum is 45.

The square root of 442648287 is about 21039.2083263606. The cubic root of 442648287 is about 762.1133968509.

The spelling of 442648287 in words is "four hundred forty-two million, six hundred forty-eight thousand, two hundred eighty-seven".