818987364 has 72 divisors (see below), whose sum is σ = 2262827840. Its totient is φ = 248225472.

The previous prime is 818987339. The next prime is 818987371. The reversal of 818987364 is 463789818.

It is a self number, because there is not a number n which added to its sum of digits gives 818987364.

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 23 ways as a sum of consecutive naturals, for example, 18297 + ... + 44415.

Almost surely, 2^818987364 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 818987364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1131413920).

818987364 is an abundant number, since it is smaller than the sum of its proper divisors (1443840476).

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

818987364 is a wasteful number, since it uses less digits than its factorization.

818987364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26209 (or 26204 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 818987364 is about 28617.9552728702. The cubic root of 818987364 is about 935.6047120043.

The spelling of 818987364 in words is "eight hundred eighteen million, nine hundred eighty-seven thousand, three hundred sixty-four".