442001443 has 16 divisors (see below), whose sum is σ = 488980800. Its totient is φ = 396933120.

The previous prime is 442001423. The next prime is 442001447. The reversal of 442001443 is 344100244.

It is a cyclic number.

It is not a de Polignac number, because 442001443 - 2¹⁷ = 441870371 is a prime.

It is a super-2 number, since 2×442001443² = 390730551228164498, which contains 22 as substring.

It is a Duffinian number.

442001443 is a modest number, since divided by 1443 gives 442 as remainder.

It is not an unprimeable number, because it can be changed into a prime (442001447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233043 + ... + 234931.

It is an arithmetic number, because the mean of its divisors is an integer number (30561300).

Almost surely, 2^442001443 is an apocalyptic number.

442001443 is a deficient number, since it is larger than the sum of its proper divisors (46979357).

442001443 is a wasteful number, since it uses less digits than its factorization.

442001443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2382.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 442001443 is about 21023.8303598559. The cubic root of 442001443 is about 761.7419892620.

Adding to 442001443 its reverse (344100244), we get a palindrome (786101687).

The spelling of 442001443 in words is "four hundred forty-two million, one thousand, four hundred forty-three".