9978592 has 72 divisors (see below), whose sum is σ = 22745016.
Its totient is φ = 4282368.
The previous prime is 9978587. The next prime is 9978599. The reversal of 9978592 is 2958799.
It is an Ulam number.
Its product of digits (408240) is a multiple of the sum of its prime factors (140).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (9978599) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120183 + ... + 120265.
It is an arithmetic number, because the mean of its divisors is an integer number (315903).
Almost surely, 29978592 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 9978592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11372508).
9978592 is an abundant number, since it is smaller than the sum of its proper divisors (12766424).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
9978592 is a wasteful number, since it uses less digits than its factorization.
9978592 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 140 (or 115 counting only the distinct ones).
The product of its digits is 408240, while the sum is 49.
The square root of 9978592 is about 3158.8909446196.
The cubic root of 9978592 is about 215.2896187038.
The spelling of 9978592 in words is "nine million, nine hundred seventy-eight thousand, five hundred ninety-two".