827745138 has 48 divisors (see below), whose sum is σ = 1959048000. Its totient is φ = 250503840.

The previous prime is 827745131. The next prime is 827745143. The reversal of 827745138 is 831547728.

827745138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 827745093 and 827745102.

It is not an unprimeable number, because it can be changed into a prime (827745131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 179688 + ... + 184236.

It is an arithmetic number, because the mean of its divisors is an integer number (40813500).

Almost surely, 2^827745138 is an apocalyptic number.

827745138 is an abundant number, since it is smaller than the sum of its proper divisors (1131302862).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

827745138 is a wasteful number, since it uses less digits than its factorization.

827745138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5487 (or 5484 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 827745138 is about 28770.5602656605. The cubic root of 827745138 is about 938.9278321710.

The spelling of 827745138 in words is "eight hundred twenty-seven million, seven hundred forty-five thousand, one hundred thirty-eight".