827921856 has 56 divisors (see below), whose sum is σ = 2243992464. Its totient is φ = 269240320.

The previous prime is 827921839. The next prime is 827921863. The reversal of 827921856 is 658129728.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44715 + ... + 60458.

It is an arithmetic number, because the mean of its divisors is an integer number (40071294).

Almost surely, 2^827921856 is an apocalyptic number.

It is an amenable number.

827921856 is an abundant number, since it is smaller than the sum of its proper divisors (1416070608).

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

827921856 is a wasteful number, since it uses less digits than its factorization.

827921856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105229 (or 105219 counting only the distinct ones).

The product of its digits is 483840, while the sum is 48.

The square root of 827921856 is about 28773.6312619732. The cubic root of 827921856 is about 938.9946456681.

It can be divided in two parts, 82792 and 1856, that added together give a palindrome (84648).

The spelling of 827921856 in words is "eight hundred twenty-seven million, nine hundred twenty-one thousand, eight hundred fifty-six".