28526643 has 12 divisors (see below), whose sum is σ = 41361840. Its totient is φ = 18945456.

The previous prime is 28526627. The next prime is 28526653. The reversal of 28526643 is 34662582.

28526643 is a `hidden beast` number, since 2 + 8 + 5 + 2 + 6 + 643 = 666.

It is not a de Polignac number, because 28526643 - 2⁴ = 28526627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28526598 and 28526607.

It is not an unprimeable number, because it can be changed into a prime (28526623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3471 + ... + 8312.

It is an arithmetic number, because the mean of its divisors is an integer number (3446820).

Almost surely, 2^28526643 is an apocalyptic number.

28526643 is a deficient number, since it is larger than the sum of its proper divisors (12835197).

28526643 is a wasteful number, since it uses less digits than its factorization.

28526643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12058 (or 12055 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 28526643 is about 5341.0338886774. The cubic root of 28526643 is about 305.5508918639.

The spelling of 28526643 in words is "twenty-eight million, five hundred twenty-six thousand, six hundred forty-three".