838222129 has 8 divisors (see below), whose sum is σ = 847112040. Its totient is φ = 829344000.

The previous prime is 838222123. The next prime is 838222159. The reversal of 838222129 is 921222838.

It can be written as a sum of positive squares in 4 ways, for example, as 140469904 + 697752225 = 11852^2 + 26415^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-838222129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (838222123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261919 + ... + 265099.

It is an arithmetic number, because the mean of its divisors is an integer number (105889005).

Almost surely, 2^838222129 is an apocalyptic number.

It is an amenable number.

838222129 is a deficient number, since it is larger than the sum of its proper divisors (8889911).

838222129 is a wasteful number, since it uses less digits than its factorization.

838222129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5891.

The product of its digits is 27648, while the sum is 37.

The square root of 838222129 is about 28952.0660575372. The cubic root of 838222129 is about 942.8726551375.

The spelling of 838222129 in words is "eight hundred thirty-eight million, two hundred twenty-two thousand, one hundred twenty-nine".