11742728 has 16 divisors (see below), whose sum is σ = 22555260. Its totient is φ = 5728000.

The previous prime is 11742713. The next prime is 11742751. The reversal of 11742728 is 82724711.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9498724 + 2244004 = 3082^2 + 1498^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11742694 and 11742703.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17573 + ... + 18228.

Almost surely, 2^11742728 is an apocalyptic number.

It is an amenable number.

11742728 is a deficient number, since it is larger than the sum of its proper divisors (10812532).

11742728 is a wasteful number, since it uses less digits than its factorization.

11742728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35848 (or 35844 counting only the distinct ones).

The product of its digits is 6272, while the sum is 32.

The square root of 11742728 is about 3426.7664058118. The cubic root of 11742728 is about 227.2948873810.

The spelling of 11742728 in words is "eleven million, seven hundred forty-two thousand, seven hundred twenty-eight".