442802681 has 4 divisors (see below), whose sum is σ = 443232372. Its totient is φ = 442372992.

The previous prime is 442802641. The next prime is 442802699. The reversal of 442802681 is 186208244.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 333391081 + 109411600 = 18259^2 + 10460^2 .

It is a cyclic number.

It is not a de Polignac number, because 442802681 - 2⁶ = 442802617 is a prime.

It is a super-2 number, since 2×442802681² = 392148428601575522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442802641) 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, 213296 + ... + 215361.

It is an arithmetic number, because the mean of its divisors is an integer number (110808093).

Almost surely, 2^442802681 is an apocalyptic number.

It is an amenable number.

442802681 is a deficient number, since it is larger than the sum of its proper divisors (429691).

442802681 is a wasteful number, since it uses less digits than its factorization.

442802681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429690.

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 442802681 is about 21042.8772034625. The cubic root of 442802681 is about 762.2019939466.

The spelling of 442802681 in words is "four hundred forty-two million, eight hundred two thousand, six hundred eighty-one".