10691728 has 30 divisors (see below), whose sum is σ = 21183974. Its totient is φ = 5227008.

The previous prime is 10691719. The next prime is 10691731. The reversal of 10691728 is 82719601.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8928144 + 1763584 = 2988^2 + 1328^2 .

It is a super-2 number, since 2×10691728² = 228626095251968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10691693 and 10691702.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 110176 + ... + 110272.

Almost surely, 2^10691728 is an apocalyptic number.

It is an amenable number.

10691728 is a deficient number, since it is larger than the sum of its proper divisors (10492246).

10691728 is an frugal number, since it uses more digits than its factorization.

10691728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 10691728 is about 3269.8207901963. The cubic root of 10691728 is about 220.3007457103.

The spelling of 10691728 in words is "ten million, six hundred ninety-one thousand, seven hundred twenty-eight".