11550720 has 120 divisors (see below), whose sum is σ = 37747584. Its totient is φ = 3014656.

The previous prime is 11550719. The next prime is 11550739. The reversal of 11550720 is 2705511.

It is a tau number, because it is divible by the number of its divisors (120).

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

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, 245737 + ... + 245783.

Almost surely, 2^11550720 is an apocalyptic number.

11550720 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 11550720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18873792).

11550720 is an abundant number, since it is smaller than the sum of its proper divisors (26196864).

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

11550720 is an frugal number, since it uses more digits than its factorization.

11550720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83 (or 57 counting only the distinct ones).

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 11550720 is about 3398.6350201220. The cubic root of 11550720 is about 226.0492230999.

The spelling of 11550720 in words is "eleven million, five hundred fifty thousand, seven hundred twenty".