999723760 has 160 divisors (see below), whose sum is σ = 2961239040. Its totient is φ = 305565696.

The previous prime is 999723701. The next prime is 999723761. The reversal of 999723760 is 67327999.

It is a junction number, because it is equal to n+sod(n) for n = 999723698 and 999723707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999723761) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 178117 + ... + 183643.

It is an arithmetic number, because the mean of its divisors is an integer number (18507744).

Almost surely, 2^999723760 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999723760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1480619520).

999723760 is an abundant number, since it is smaller than the sum of its proper divisors (1961515280).

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

999723760 is a wasteful number, since it uses less digits than its factorization.

999723760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5583 (or 5577 counting only the distinct ones).

The product of its (nonzero) digits is 1285956, while the sum is 52.

The square root of 999723760 is about 31618.4085621019. The cubic root of 999723760 is about 999.9079115200.

The spelling of 999723760 in words is "nine hundred ninety-nine million, seven hundred twenty-three thousand, seven hundred sixty".