818659872 has 120 divisors (see below), whose sum is σ = 2427041232. Its totient is φ = 270691200.

The previous prime is 818659867. The next prime is 818659943. The reversal of 818659872 is 278956818.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 19 ways as a sum of consecutive naturals, for example, 338347 + ... + 340757.

Almost surely, 2^818659872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 818659872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1213520616).

818659872 is an abundant number, since it is smaller than the sum of its proper divisors (1608381360).

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

818659872 is a wasteful number, since it uses less digits than its factorization.

818659872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564 (or 2547 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 54.

The square root of 818659872 is about 28612.2329083209. The cubic root of 818659872 is about 935.4799872846.

The spelling of 818659872 in words is "eight hundred eighteen million, six hundred fifty-nine thousand, eight hundred seventy-two".