838205812 has 12 divisors (see below), whose sum is σ = 1494537156. Its totient is φ = 411195200.

The previous prime is 838205801. The next prime is 838205831. The reversal of 838205812 is 218502838.

It can be written as a sum of positive squares in 2 ways, for example, as 263932516 + 574273296 = 16246^2 + 23964^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1976689 + ... + 1977112.

It is an arithmetic number, because the mean of its divisors is an integer number (124544763).

Almost surely, 2^838205812 is an apocalyptic number.

It is an amenable number.

838205812 is a deficient number, since it is larger than the sum of its proper divisors (656331344).

838205812 is a wasteful number, since it uses less digits than its factorization.

838205812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3953858 (or 3953856 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 838205812 is about 28951.7842628049. The cubic root of 838205812 is about 942.8665370484.

The spelling of 838205812 in words is "eight hundred thirty-eight million, two hundred five thousand, eight hundred twelve".