818016840 has 256 divisors, whose sum is σ = 2874009600. Its totient is φ = 206668800.

The previous prime is 818016839. The next prime is 818016853. The reversal of 818016840 is 48610818.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 818016795 and 818016804.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1774210 + ... + 1774670.

It is an arithmetic number, because the mean of its divisors is an integer number (11226600).

Almost surely, 2^818016840 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 818016840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1437004800).

818016840 is an abundant number, since it is smaller than the sum of its proper divisors (2055992760).

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

818016840 is a wasteful number, since it uses less digits than its factorization.

818016840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565 (or 555 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 818016840 is about 28600.9936890312. The cubic root of 818016840 is about 935.2349929329.

The spelling of 818016840 in words is "eight hundred eighteen million, sixteen thousand, eight hundred forty".