442218788 has 12 divisors (see below), whose sum is σ = 844235952. Its totient is φ = 201008520.

The previous prime is 442218781. The next prime is 442218809. The reversal of 442218788 is 887812244.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 10050427 = 442218788 / (4 + 4 + 2 + 2 + 1 + 8 + 7 + 8 + 8).

It is not an unprimeable number, because it can be changed into a prime (442218781) 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, 5025170 + ... + 5025257.

It is an arithmetic number, because the mean of its divisors is an integer number (70352996).

Almost surely, 2^442218788 is an apocalyptic number.

It is an amenable number.

442218788 is a deficient number, since it is larger than the sum of its proper divisors (402017164).

442218788 is a wasteful number, since it uses less digits than its factorization.

442218788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10050442 (or 10050440 counting only the distinct ones).

The product of its digits is 229376, while the sum is 44.

The square root of 442218788 is about 21028.9987398354. The cubic root of 442218788 is about 761.8668257195.

The spelling of 442218788 in words is "four hundred forty-two million, two hundred eighteen thousand, seven hundred eighty-eight".