11728755 has 24 divisors (see below), whose sum is σ = 20547072. Its totient is φ = 6188544.

The previous prime is 11728751. The next prime is 11728777. The reversal of 11728755 is 55782711.

It is not a de Polignac number, because 11728755 - 2² = 11728751 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11728751) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3022 + ... + 5708.

It is an arithmetic number, because the mean of its divisors is an integer number (856128).

Almost surely, 2^11728755 is an apocalyptic number.

11728755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11728755 is a deficient number, since it is larger than the sum of its proper divisors (8818317).

11728755 is a wasteful number, since it uses less digits than its factorization.

11728755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2795 (or 2792 counting only the distinct ones).

The product of its digits is 19600, while the sum is 36.

The square root of 11728755 is about 3424.7269964188. The cubic root of 11728755 is about 227.2046967533.

The spelling of 11728755 in words is "eleven million, seven hundred twenty-eight thousand, seven hundred fifty-five".