841968638 has 16 divisors (see below), whose sum is σ = 1476942720. Its totient is φ = 352451736.

The previous prime is 841968637. The next prime is 841968643. The reversal of 841968638 is 836869148.

It is a super-2 number, since 2×841968638² = 1417822374751150088, which contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 841968638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (841968637) 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, 698708 + ... + 699911.

It is an arithmetic number, because the mean of its divisors is an integer number (92308920).

Almost surely, 2^841968638 is an apocalyptic number.

841968638 is a deficient number, since it is larger than the sum of its proper divisors (634974082).

841968638 is a wasteful number, since it uses less digits than its factorization.

841968638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398671.

The product of its digits is 1990656, while the sum is 53.

The square root of 841968638 is about 29016.6958491142. The cubic root of 841968638 is about 944.2753187364.

The spelling of 841968638 in words is "eight hundred forty-one million, nine hundred sixty-eight thousand, six hundred thirty-eight".