9919040 has 56 divisors (see below), whose sum is σ = 23896320. Its totient is φ = 3921408.

The previous prime is 9919037. The next prime is 9919057. The reversal of 9919040 is 409199.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 9918988 and 9919006.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44369 + ... + 44591.

It is an arithmetic number, because the mean of its divisors is an integer number (426720).

Almost surely, 2^9919040 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 9919040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11948160).

9919040 is an abundant number, since it is smaller than the sum of its proper divisors (13977280).

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

9919040 is a wasteful number, since it uses less digits than its factorization.

9919040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379 (or 369 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 9919040 is about 3149.4507457650. The cubic root of 9919040 is about 214.8604827673.

The spelling of 9919040 in words is "nine million, nine hundred nineteen thousand, forty".