828138007 has 4 divisors (see below), whose sum is σ = 856694520. Its totient is φ = 799581496.

The previous prime is 828137923. The next prime is 828138029. The reversal of 828138007 is 700831828.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-828138007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (828138037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14278213 + ... + 14278270.

It is an arithmetic number, because the mean of its divisors is an integer number (214173630).

Almost surely, 2^828138007 is an apocalyptic number.

828138007 is a deficient number, since it is larger than the sum of its proper divisors (28556513).

828138007 is a wasteful number, since it uses less digits than its factorization.

828138007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28556512.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 828138007 is about 28777.3870773564. The cubic root of 828138007 is about 939.0763550587.

The spelling of 828138007 in words is "eight hundred twenty-eight million, one hundred thirty-eight thousand, seven".