838378021810 has 16 divisors (see below), whose sum is σ = 1724663359296. Its totient is φ = 287443893168.

The previous prime is 838378021781. The next prime is 838378021867. The reversal of 838378021810 is 18120873838.

It is a happy number.

838378021810 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×838378021810² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5988414372 + ... + 5988414511.

It is an arithmetic number, because the mean of its divisors is an integer number (107791459956).

Almost surely, 2^838378021810 is an apocalyptic number.

838378021810 is an abundant number, since it is smaller than the sum of its proper divisors (886285337486).

838378021810 is a wasteful number, since it uses less digits than its factorization.

838378021810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11976828897.

The product of its (nonzero) digits is 516096, while the sum is 49.

The spelling of 838378021810 in words is "eight hundred thirty-eight billion, three hundred seventy-eight million, twenty-one thousand, eight hundred ten".