918781856 has 24 divisors (see below), whose sum is σ = 1814337504. Its totient is φ = 457997760.

The previous prime is 918781849. The next prime is 918781859. The reversal of 918781856 is 658187819.

It is a junction number, because it is equal to n+sod(n) for n = 918781798 and 918781807.

It is not an unprimeable number, because it can be changed into a prime (918781859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32780 + ... + 53963.

It is an arithmetic number, because the mean of its divisors is an integer number (75597396).

Almost surely, 2^918781856 is an apocalyptic number.

It is an amenable number.

918781856 is a deficient number, since it is larger than the sum of its proper divisors (895555648).

918781856 is a wasteful number, since it uses less digits than its factorization.

918781856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87084 (or 87076 counting only the distinct ones).

The product of its digits is 967680, while the sum is 53.

The square root of 918781856 is about 30311.4146156196. The cubic root of 918781856 is about 972.1593782019.

The spelling of 918781856 in words is "nine hundred eighteen million, seven hundred eighty-one thousand, eight hundred fifty-six".