827399138 has 8 divisors (see below), whose sum is σ = 1241244588. Its totient is φ = 413650944.

The previous prime is 827399123. The next prime is 827399141. The reversal of 827399138 is 831993728.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 748952689 + 78446449 = 27367^2 + 8857^2 .

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

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, 3170 + ... + 40802.

Almost surely, 2^827399138 is an apocalyptic number.

827399138 is a deficient number, since it is larger than the sum of its proper divisors (413845450).

827399138 is a wasteful number, since it uses less digits than its factorization.

827399138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48628.

The product of its digits is 653184, while the sum is 50.

The square root of 827399138 is about 28764.5465460521. The cubic root of 827399138 is about 938.7969890362.

The spelling of 827399138 in words is "eight hundred twenty-seven million, three hundred ninety-nine thousand, one hundred thirty-eight".