11573440 has 56 divisors (see below), whose sum is σ = 28072080. Its totient is φ = 4543488.

The previous prime is 11573423. The next prime is 11573501. The reversal of 11573440 is 4437511.

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, 18574 + ... + 19186.

Almost surely, 2^11573440 is an apocalyptic number.

11573440 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 11573440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14036040).

11573440 is an abundant number, since it is smaller than the sum of its proper divisors (16498640).

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

11573440 is an equidigital number, since it uses as much as digits as its factorization.

11573440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689 (or 679 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 11573440 is about 3401.9758964461. The cubic root of 11573440 is about 226.1973372337.

The spelling of 11573440 in words is "eleven million, five hundred seventy-three thousand, four hundred forty".