442505579 has 8 divisors (see below), whose sum is σ = 473008032. Its totient is φ = 412941760.

The previous prime is 442505551. The next prime is 442505617. The reversal of 442505579 is 975505244.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442505579 is a prime.

It is a super-2 number, since 2×442505579² = 391622374892250482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442505879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233684 + ... + 235569.

It is an arithmetic number, because the mean of its divisors is an integer number (59126004).

Almost surely, 2^442505579 is an apocalyptic number.

442505579 is a deficient number, since it is larger than the sum of its proper divisors (30502453).

442505579 is a wasteful number, since it uses less digits than its factorization.

442505579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469317.

The product of its (nonzero) digits is 252000, while the sum is 41.

The square root of 442505579 is about 21035.8165755456. The cubic root of 442505579 is about 762.0314872989.

The spelling of 442505579 in words is "four hundred forty-two million, five hundred five thousand, five hundred seventy-nine".