442816687 has 4 divisors (see below), whose sum is σ = 453617136. Its totient is φ = 432016240.

The previous prime is 442816639. The next prime is 442816729. The reversal of 442816687 is 786618244.

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

It is a cyclic number.

It is not a de Polignac number, because 442816687 - 2⁷ = 442816559 is a prime.

It is a super-5 number, since 5×442816687⁵ (a number of 44 digits) contains 55555 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442816487) 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, 5400163 + ... + 5400244.

It is an arithmetic number, because the mean of its divisors is an integer number (113404284).

Almost surely, 2^442816687 is an apocalyptic number.

442816687 is a deficient number, since it is larger than the sum of its proper divisors (10800449).

442816687 is a wasteful number, since it uses less digits than its factorization.

442816687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10800448.

The product of its digits is 516096, while the sum is 46.

The square root of 442816687 is about 21043.2099975265. The cubic root of 442816687 is about 762.2100300983.

It can be divided in two parts, 4428 and 16687, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 442816687 in words is "four hundred forty-two million, eight hundred sixteen thousand, six hundred eighty-seven".