838572390942 has 128 divisors (see below), whose sum is σ = 1983515143680. Its totient is φ = 233001162240.

The previous prime is 838572390913. The next prime is 838572390967. The reversal of 838572390942 is 249093275838.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 247437784 + ... + 247441172.

It is an arithmetic number, because the mean of its divisors is an integer number (15496212060).

Almost surely, 2^838572390942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 838572390942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (991757571840).

838572390942 is an abundant number, since it is smaller than the sum of its proper divisors (1144942752738).

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

838572390942 is a wasteful number, since it uses less digits than its factorization.

838572390942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5258.

The product of its (nonzero) digits is 26127360, while the sum is 60.

It can be divided in two parts, 8385 and 72390942, that added together give a palindrome (72399327).

The spelling of 838572390942 in words is "eight hundred thirty-eight billion, five hundred seventy-two million, three hundred ninety thousand, nine hundred forty-two".