442503665 has 8 divisors (see below), whose sum is σ = 531233640. Its totient is φ = 353850112.

The previous prime is 442503661. The next prime is 442503667. The reversal of 442503665 is 566305244.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 200704 + 442302961 = 448^2 + 21031^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 442503665 - 2² = 442503661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (442503661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5480 + ... + 30249.

It is an arithmetic number, because the mean of its divisors is an integer number (66404205).

Almost surely, 2^442503665 is an apocalyptic number.

It is an amenable number.

442503665 is a deficient number, since it is larger than the sum of its proper divisors (88729975).

442503665 is a wasteful number, since it uses less digits than its factorization.

442503665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38211.

The product of its (nonzero) digits is 86400, while the sum is 35.

The square root of 442503665 is about 21035.7710816599. The cubic root of 442503665 is about 762.0303886081.

The spelling of 442503665 in words is "four hundred forty-two million, five hundred three thousand, six hundred sixty-five".