818851872 has 24 divisors (see below), whose sum is σ = 2149486416. Its totient is φ = 272950592.

The previous prime is 818851849. The next prime is 818851897. The reversal of 818851872 is 278158818.

It is a tau number, because it is divible by the number of its divisors (24).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4264758 + ... + 4264949.

It is an arithmetic number, because the mean of its divisors is an integer number (89561934).

Almost surely, 2^818851872 is an apocalyptic number.

It is an amenable number.

818851872 is an abundant number, since it is smaller than the sum of its proper divisors (1330634544).

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

818851872 is a wasteful number, since it uses less digits than its factorization.

818851872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8529720 (or 8529712 counting only the distinct ones).

The product of its digits is 286720, while the sum is 48.

The square root of 818851872 is about 28615.5879198733. The cubic root of 818851872 is about 935.5531141611.

The spelling of 818851872 in words is "eight hundred eighteen million, eight hundred fifty-one thousand, eight hundred seventy-two".