999864536 has 16 divisors (see below), whose sum is σ = 2045177640. Its totient is φ = 454483840.

The previous prime is 999864473. The next prime is 999864539. The reversal of 999864536 is 635468999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999864539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5680961 + ... + 5681136.

Almost surely, 2^999864536 is an apocalyptic number.

It is an amenable number.

999864536 is an abundant number, since it is smaller than the sum of its proper divisors (1045313104).

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

999864536 is a wasteful number, since it uses less digits than its factorization.

999864536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11362114 (or 11362110 counting only the distinct ones).

The product of its digits is 12597120, while the sum is 59.

The square root of 999864536 is about 31620.6346552374. The cubic root of 999864536 is about 999.9548432942.

The spelling of 999864536 in words is "nine hundred ninety-nine million, eight hundred sixty-four thousand, five hundred thirty-six".