11870728 has 16 divisors (see below), whose sum is σ = 22678380. Its totient is φ = 5823168.

The previous prime is 11870717. The next prime is 11870753. The reversal of 11870728 is 82707811.

It can be written as a sum of positive squares in 2 ways, for example, as 10227204 + 1643524 = 3198^2 + 1282^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11870693 and 11870702.

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, 13575 + ... + 14422.

Almost surely, 2^11870728 is an apocalyptic number.

It is an amenable number.

11870728 is a deficient number, since it is larger than the sum of its proper divisors (10807652).

11870728 is a wasteful number, since it uses less digits than its factorization.

11870728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28056 (or 28052 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 34.

The square root of 11870728 is about 3445.3922853574. The cubic root of 11870728 is about 228.1177702844.

The spelling of 11870728 in words is "eleven million, eight hundred seventy thousand, seven hundred twenty-eight".