442495665 has 12 divisors (see below), whose sum is σ = 766992564. Its totient is φ = 235997664.

The previous prime is 442495663. The next prime is 442495679. The reversal of 442495665 is 566594244.

442495665 is a `hidden beast` number, since 4 + 42 + 49 + 566 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 63297936 + 379197729 = 7956^2 + 19473^2 .

It is not a de Polignac number, because 442495665 - 2¹ = 442495663 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 9833237 = 442495665 / (4 + 4 + 2 + 4 + 9 + 5 + 6 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 442495665.

It is not an unprimeable number, because it can be changed into a prime (442495663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4916574 + ... + 4916663.

It is an arithmetic number, because the mean of its divisors is an integer number (63916047).

Almost surely, 2^442495665 is an apocalyptic number.

442495665 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

442495665 is a deficient number, since it is larger than the sum of its proper divisors (324496899).

442495665 is a wasteful number, since it uses less digits than its factorization.

442495665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9833248 (or 9833245 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The square root of 442495665 is about 21035.5809285125. The cubic root of 442495665 is about 762.0257963450.

The spelling of 442495665 in words is "four hundred forty-two million, four hundred ninety-five thousand, six hundred sixty-five".