815916860 has 48 divisors (see below), whose sum is σ = 1877686272. Its totient is φ = 295348800.

The previous prime is 815916833. The next prime is 815916919. The reversal of 815916860 is 68619518.

815916860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40745 + ... + 57375.

It is an arithmetic number, because the mean of its divisors is an integer number (39118464).

Almost surely, 2^815916860 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 815916860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (938843136).

815916860 is an abundant number, since it is smaller than the sum of its proper divisors (1061769412).

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

815916860 is a wasteful number, since it uses less digits than its factorization.

815916860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16874 (or 16872 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 815916860 is about 28564.2584360246. The cubic root of 815916860 is about 934.4340078766.

The spelling of 815916860 in words is "eight hundred fifteen million, nine hundred sixteen thousand, eight hundred sixty".