442683647 has 16 divisors (see below), whose sum is σ = 519644160. Its totient is φ = 369246048.

The previous prime is 442683629. The next prime is 442683671. The reversal of 442683647 is 746386244.

It is a cyclic number.

It is not a de Polignac number, because 442683647 - 2⁶ = 442683583 is a prime.

It is a super-2 number, since 2×442683647² = 391937622642441218, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 442683598 and 442683607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442683547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55133 + ... + 62649.

It is an arithmetic number, because the mean of its divisors is an integer number (32477760).

Almost surely, 2^442683647 is an apocalyptic number.

442683647 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

442683647 is a deficient number, since it is larger than the sum of its proper divisors (76960513).

442683647 is a wasteful number, since it uses less digits than its factorization.

442683647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7750.

The product of its digits is 774144, while the sum is 44.

The square root of 442683647 is about 21040.0486453810. The cubic root of 442683647 is about 762.1336895701.

The spelling of 442683647 in words is "four hundred forty-two million, six hundred eighty-three thousand, six hundred forty-seven".