838138236 has 48 divisors (see below), whose sum is σ = 2157475488. Its totient is φ = 251596800.

The previous prime is 838138229. The next prime is 838138243. The reversal of 838138236 is 632831838.

It is an interprime number because it is at equal distance from previous prime (838138229) and next prime (838138243).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59125 + ... + 71916.

It is an arithmetic number, because the mean of its divisors is an integer number (44947406).

Almost surely, 2^838138236 is an apocalyptic number.

It is an amenable number.

838138236 is an abundant number, since it is smaller than the sum of its proper divisors (1319337252).

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

838138236 is a wasteful number, since it uses less digits than its factorization.

838138236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131102 (or 131100 counting only the distinct ones).

The product of its digits is 165888, while the sum is 42.

The square root of 838138236 is about 28950.6171954934. The cubic root of 838138236 is about 942.8411984579.

The spelling of 838138236 in words is "eight hundred thirty-eight million, one hundred thirty-eight thousand, two hundred thirty-six".