838684172 has 12 divisors (see below), whose sum is σ = 1468220880. Its totient is φ = 419192496.

The previous prime is 838684157. The next prime is 838684177. The reversal of 838684172 is 271486838.

It is a super-2 number, since 2×838684172² = 1406782280726651168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (838684177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24272 + ... + 47607.

It is an arithmetic number, because the mean of its divisors is an integer number (122351740).

Almost surely, 2^838684172 is an apocalyptic number.

It is an amenable number.

838684172 is a deficient number, since it is larger than the sum of its proper divisors (629536708).

838684172 is a wasteful number, since it uses less digits than its factorization.

838684172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74800 (or 74798 counting only the distinct ones).

The product of its digits is 516096, while the sum is 47.

The square root of 838684172 is about 28960.0444060433. The cubic root of 838684172 is about 943.0458660617.

The spelling of 838684172 in words is "eight hundred thirty-eight million, six hundred eighty-four thousand, one hundred seventy-two".