838134431838 has 32 divisors (see below), whose sum is σ = 2031841048320. Its totient is φ = 253980130680.

The previous prime is 838134431837. The next prime is 838134431921.

It is a happy number.

838134431838 is a `hidden beast` number, since 8 + 3 + 8 + 13 + 443 + 183 + 8 = 666.

838134431838 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (838134431837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 705499770 + ... + 705500957.

It is an arithmetic number, because the mean of its divisors is an integer number (63495032760).

Almost surely, 2^838134431838 is an apocalyptic number.

838134431838 is an abundant number, since it is smaller than the sum of its proper divisors (1193706616482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

838134431838 is a wasteful number, since it uses less digits than its factorization.

838134431838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411000749 (or 1411000743 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 54.

The spelling of 838134431838 in words is "eight hundred thirty-eight billion, one hundred thirty-four million, four hundred thirty-one thousand, eight hundred thirty-eight".