11056640 has 80 divisors (see below), whose sum is σ = 30346272. Its totient is φ = 3784704.

The previous prime is 11056637. The next prime is 11056649. The reversal of 11056640 is 4665011.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11056649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17612 + ... + 18228.

Almost surely, 2^11056640 is an apocalyptic number.

11056640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11056640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15173136).

11056640 is an abundant number, since it is smaller than the sum of its proper divisors (19289632).

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

11056640 is an frugal number, since it uses more digits than its factorization.

11056640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647 (or 631 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 11056640 is about 3325.1526280759. The cubic root of 11056640 is about 222.7790716170.

The spelling of 11056640 in words is "eleven million, fifty-six thousand, six hundred forty".