838879381 has 8 divisors (see below), whose sum is σ = 853103384. Its totient is φ = 824670720.

The previous prime is 838879373. The next prime is 838879397. The reversal of 838879381 is 183978838.

It can be written as a sum of positive squares in 4 ways, for example, as 1703025 + 837176356 = 1305^2 + 28934^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 838879381 - 2³ = 838879373 is a prime.

It is a super-2 number, since 2×838879381² = 1407437231733886322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (838879081) 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, 177805 + ... + 182461.

It is an arithmetic number, because the mean of its divisors is an integer number (106637923).

Almost surely, 2^838879381 is an apocalyptic number.

It is an amenable number.

838879381 is a deficient number, since it is larger than the sum of its proper divisors (14224003).

838879381 is a wasteful number, since it uses less digits than its factorization.

838879381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7671.

The product of its digits is 2322432, while the sum is 55.

The square root of 838879381 is about 28963.4145259153. The cubic root of 838879381 is about 943.1190269987.

The spelling of 838879381 in words is "eight hundred thirty-eight million, eight hundred seventy-nine thousand, three hundred eighty-one".