838102140 has 120 divisors (see below), whose sum is σ = 2641217040. Its totient is φ = 223388928.

The previous prime is 838102093. The next prime is 838102147. The reversal of 838102140 is 41201838.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (838102147) 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 39 ways as a sum of consecutive naturals, for example, 392596 + ... + 394724.

It is an arithmetic number, because the mean of its divisors is an integer number (22010142).

Almost surely, 2^838102140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 838102140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1320608520).

838102140 is an abundant number, since it is smaller than the sum of its proper divisors (1803114900).

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

838102140 is an equidigital number, since it uses as much as digits as its factorization.

838102140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2165 (or 2139 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 838102140 is about 28949.9937823828. The cubic root of 838102140 is about 942.8276631869.

Adding to 838102140 its reverse (41201838), we get a palindrome (879303978).

The spelling of 838102140 in words is "eight hundred thirty-eight million, one hundred two thousand, one hundred forty".