11528681 has 8 divisors (see below), whose sum is σ = 12083904. Its totient is φ = 10978000.

The previous prime is 11528653. The next prime is 11528701. The reversal of 11528681 is 18682511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11528681 is a prime.

It is a super-2 number, since 2×11528681² = 265820971199522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11528651) 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, 4775 + ... + 6771.

It is an arithmetic number, because the mean of its divisors is an integer number (1510488).

Almost surely, 2^11528681 is an apocalyptic number.

It is an amenable number.

11528681 is a deficient number, since it is larger than the sum of its proper divisors (555223).

11528681 is a wasteful number, since it uses less digits than its factorization.

11528681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2271.

The product of its digits is 3840, while the sum is 32.

The square root of 11528681 is about 3395.3911409439. The cubic root of 11528681 is about 225.9053627832.

The spelling of 11528681 in words is "eleven million, five hundred twenty-eight thousand, six hundred eighty-one".