9913440 has 96 divisors (see below), whose sum is σ = 32901120. Its totient is φ = 2502144.

The previous prime is 9913439. The next prime is 9913469. The reversal of 9913440 is 443199.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 9913398 and 9913407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8577 + ... + 9663.

It is an arithmetic number, because the mean of its divisors is an integer number (342720).

Almost surely, 2^9913440 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 9913440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16450560).

9913440 is an abundant number, since it is smaller than the sum of its proper divisors (22987680).

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

9913440 is a wasteful number, since it uses less digits than its factorization.

9913440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124 (or 1116 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 9913440 is about 3148.5615763393. The cubic root of 9913440 is about 214.8200405065.

The spelling of 9913440 in words is "nine million, nine hundred thirteen thousand, four hundred forty".