999725760 has 448 divisors, whose sum is σ = 3929725440. Its totient is φ = 237219840.

The previous prime is 999725759. The next prime is 999725761. The reversal of 999725760 is 67527999.

999725760 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (999725759) and next prime (999725761).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 999725697 and 999725706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999725761) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6367602 + ... + 6367758.

Almost surely, 2^999725760 is an apocalyptic number.

999725760 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999725760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1964862720).

999725760 is an abundant number, since it is smaller than the sum of its proper divisors (2929999680).

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

999725760 is a wasteful number, since it uses less digits than its factorization.

999725760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 2143260, while the sum is 54.

The square root of 999725760 is about 31618.4401892313. The cubic root of 999725760 is about 999.9085783090.

The spelling of 999725760 in words is "nine hundred ninety-nine million, seven hundred twenty-five thousand, seven hundred sixty".