11399720 has 32 divisors (see below), whose sum is σ = 26766720. Its totient is φ = 4361280.

The previous prime is 11399683. The next prime is 11399761. The reversal of 11399720 is 2799311.

It is a happy number.

11399720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its 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, 5276 + ... + 7115.

It is an arithmetic number, because the mean of its divisors is an integer number (836460).

Almost surely, 2^11399720 is an apocalyptic number.

11399720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11399720 is an abundant number, since it is smaller than the sum of its proper divisors (15367000).

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

11399720 is a wasteful number, since it uses less digits than its factorization.

11399720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12425 (or 12421 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 11399720 is about 3376.3471385508. The cubic root of 11399720 is about 225.0598688421.

The spelling of 11399720 in words is "eleven million, three hundred ninety-nine thousand, seven hundred twenty".