9999392 has 54 divisors (see below), whose sum is σ = 21824397.
Its totient is φ = 4507776.
The previous prime is 9999347. The next prime is 9999397. The reversal of 9999392 is 2939999.
It is a powerful number, because all its prime factors have an exponent greater than 1
and also an Achilles number because it is not a perfect power.
It can be written as a sum of positive squares in 2 ways, for example, as 8549776 + 1449616 = 2924^2 + 1204^2
It is an ABA number since it can be written as A⋅BA, here for A=2, B=2236.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 9999392.
It is not an unprimeable number, because it can be changed into a prime (9999397) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 232523 + ... + 232565.
Almost surely, 29999392 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 9999392
9999392 is an abundant number, since it is smaller than the sum of its proper divisors (11825005).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
9999392 is a wasteful number, since it uses less digits than its factorization.
9999392 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 122 (or 58 counting only the distinct ones).
The product of its digits is 354294, while the sum is 50.
The square root of 9999392 is about 3162.1815254662.
The cubic root of 9999392 is about 215.4391025937.
Multiplying 9999392 by its sum of digits (50), we get a square (499969600 = 223602).
The spelling of 9999392 in words is "nine million, nine hundred ninety-nine thousand, three hundred ninety-two".