838142443 has 4 divisors (see below), whose sum is σ = 865179328. Its totient is φ = 811105560.

The previous prime is 838142413. The next prime is 838142447. The reversal of 838142443 is 344241838.

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 838142443 - 2⁵ = 838142411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (838142447) 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 3 ways as a sum of consecutive naturals, for example, 13518396 + ... + 13518457.

It is an arithmetic number, because the mean of its divisors is an integer number (216294832).

Almost surely, 2^838142443 is an apocalyptic number.

838142443 is a deficient number, since it is larger than the sum of its proper divisors (27036885).

838142443 is a wasteful number, since it uses less digits than its factorization.

838142443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27036884.

The product of its digits is 73728, while the sum is 37.

The square root of 838142443 is about 28950.6898536114. The cubic root of 838142443 is about 942.8427759727.

The spelling of 838142443 in words is "eight hundred thirty-eight million, one hundred forty-two thousand, four hundred forty-three".