838981215 has 12 divisors (see below), whose sum is σ = 1454234184. Its totient is φ = 447456624.

The previous prime is 838981211. The next prime is 838981249. The reversal of 838981215 is 512189838.

It is a happy number.

838981215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 838981215 - 2² = 838981211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 18644027 = 838981215 / (8 + 3 + 8 + 9 + 8 + 1 + 2 + 1 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (838981211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9321969 + ... + 9322058.

It is an arithmetic number, because the mean of its divisors is an integer number (121186182).

Almost surely, 2^838981215 is an apocalyptic number.

838981215 is a deficient number, since it is larger than the sum of its proper divisors (615252969).

838981215 is a wasteful number, since it uses less digits than its factorization.

838981215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18644038 (or 18644035 counting only the distinct ones).

The product of its digits is 138240, while the sum is 45.

The square root of 838981215 is about 28965.1724489947. The cubic root of 838981215 is about 943.1571881055.

The spelling of 838981215 in words is "eight hundred thirty-eight million, nine hundred eighty-one thousand, two hundred fifteen".