999912560 has 20 divisors (see below), whose sum is σ = 2324796888. Its totient is φ = 399964992.

The previous prime is 999912553. The next prime is 999912607. The reversal of 999912560 is 65219999.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 999912499 and 999912508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6249374 + ... + 6249533.

Almost surely, 2^999912560 is an apocalyptic number.

It is an amenable number.

999912560 is an abundant number, since it is smaller than the sum of its proper divisors (1324884328).

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

999912560 is a wasteful number, since it uses less digits than its factorization.

999912560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12498920 (or 12498914 counting only the distinct ones).

The product of its (nonzero) digits is 393660, while the sum is 50.

The square root of 999912560 is about 31621.3940236670. The cubic root of 999912560 is about 999.9708524838.

The spelling of 999912560 in words is "nine hundred ninety-nine million, nine hundred twelve thousand, five hundred sixty".