11428720 has 40 divisors (see below), whose sum is σ = 26712576. Its totient is φ = 4547328.

The previous prime is 11428717. The next prime is 11428721. The reversal of 11428720 is 2782411.

It is a happy number.

11428720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11428721) 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, 29649 + ... + 30031.

Almost surely, 2^11428720 is an apocalyptic number.

11428720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11428720 is an abundant number, since it is smaller than the sum of its proper divisors (15283856).

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

11428720 is a wasteful number, since it uses less digits than its factorization.

11428720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769 (or 763 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 11428720 is about 3380.6389928533. The cubic root of 11428720 is about 225.2505521660.

The spelling of 11428720 in words is "eleven million, four hundred twenty-eight thousand, seven hundred twenty".