999916860 has 48 divisors (see below), whose sum is σ = 2875442976. Its totient is φ = 259437312.

The previous prime is 999916859. The next prime is 999916861. The reversal of 999916860 is 68619999.

It is an interprime number because it is at equal distance from previous prime (999916859) and next prime (999916861).

It is a self number, because there is not a number n which added to its sum of digits gives 999916860.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999916861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222987 + ... + 227426.

It is an arithmetic number, because the mean of its divisors is an integer number (59905062).

Almost surely, 2^999916860 is an apocalyptic number.

It is an amenable number.

999916860 is an abundant number, since it is smaller than the sum of its proper divisors (1875526116).

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

999916860 is a wasteful number, since it uses less digits than its factorization.

999916860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450462 (or 450460 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 57.

The square root of 999916860 is about 31621.4620155362. The cubic root of 999916860 is about 999.9722858986.

The spelling of 999916860 in words is "nine hundred ninety-nine million, nine hundred sixteen thousand, eight hundred sixty".