999372 has 48 divisors (see below), whose sum is σ = 2604672. Its totient is φ = 295680.

The previous prime is 999371. The next prime is 999377. The reversal of 999372 is 273999.

It is an Ulam number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 999372.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 999372.

It is not an unprimeable number, because it can be changed into a prime (999371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8788 + ... + 8900.

It is an arithmetic number, because the mean of its divisors is an integer number (54264).

2⁹⁹⁹³⁷² 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 999372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1302336).

999372 is an abundant number, since it is smaller than the sum of its proper divisors (1605300).

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

999372 is a wasteful number, since it uses less digits than its factorization.

999372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 196 counting only the distinct ones).

The product of its digits is 30618, while the sum is 39.

The square root of 999372 is about 999.6859506865. The cubic root of 999372 is about 99.9790622831.

The spelling of 999372 in words is "nine hundred ninety-nine thousand, three hundred seventy-two".