42844681 has 8 divisors (see below), whose sum is σ = 46871424. Its totient is φ = 38839920.

The previous prime is 42844667. The next prime is 42844693. The reversal of 42844681 is 18644824.

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

It is a cyclic number.

It is not a de Polignac number, because 42844681 - 2⁷ = 42844553 is a prime.

It is a super-2 number, since 2×42844681² = 3671333379983522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42844681.

It is not an unprimeable number, because it can be changed into a prime (42844181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1270 + ... + 9343.

It is an arithmetic number, because the mean of its divisors is an integer number (5858928).

Almost surely, 2^42844681 is an apocalyptic number.

It is an amenable number.

42844681 is a deficient number, since it is larger than the sum of its proper divisors (4026743).

42844681 is a wasteful number, since it uses less digits than its factorization.

42844681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10991.

The product of its digits is 49152, while the sum is 37.

The square root of 42844681 is about 6545.5848478192. The cubic root of 42844681 is about 349.9174798653.

The spelling of 42844681 in words is "forty-two million, eight hundred forty-four thousand, six hundred eighty-one".