828490378831 has 4 divisors (see below), whose sum is σ = 828497800872. Its totient is φ = 828482956792.

The previous prime is 828490378799. The next prime is 828490378841. The reversal of 828490378831 is 138873094828.

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

It is a cyclic number.

It is not a de Polignac number, because 828490378831 - 2⁵ = 828490378799 is a prime.

It is a super-2 number, since 2×828490378831² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 828490378831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (828490378841) 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, 3540985 + ... + 3767698.

It is an arithmetic number, because the mean of its divisors is an integer number (207124450218).

Almost surely, 2^828490378831 is an apocalyptic number.

828490378831 is a deficient number, since it is larger than the sum of its proper divisors (7422041).

828490378831 is a wasteful number, since it uses less digits than its factorization.

828490378831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7422040.

The product of its (nonzero) digits is 18579456, while the sum is 61.

The spelling of 828490378831 in words is "eight hundred twenty-eight billion, four hundred ninety million, three hundred seventy-eight thousand, eight hundred thirty-one".