999728000 has 64 divisors (see below), whose sum is σ = 2485613520. Its totient is φ = 399884800.

The previous prime is 999727999. The next prime is 999728003. The reversal of 999728000 is 827999.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999728003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15242 + ... + 47241.

Almost surely, 2^999728000 is an apocalyptic number.

It is an amenable number.

999728000 is an abundant number, since it is smaller than the sum of its proper divisors (1485885520).

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

999728000 is an equidigital number, since it uses as much as digits as its factorization.

999728000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62512 (or 62490 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 999728000 is about 31618.4756115787. The cubic root of 999728000 is about 999.9093251116.

The spelling of 999728000 in words is "nine hundred ninety-nine million, seven hundred twenty-eight thousand".