28561527 has 6 divisors (see below), whose sum is σ = 41255552. Its totient is φ = 19041012.

The previous prime is 28561501. The next prime is 28561531. The reversal of 28561527 is 72516582.

It is a happy number.

It is not a de Polignac number, because 28561527 - 2⁷ = 28561399 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28561491 and 28561500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28561327) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1586743 + ... + 1586760.

Almost surely, 2^28561527 is an apocalyptic number.

28561527 is a deficient number, since it is larger than the sum of its proper divisors (12694025).

28561527 is a wasteful number, since it uses less digits than its factorization.

28561527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3173509 (or 3173506 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 28561527 is about 5344.2985507922. The cubic root of 28561527 is about 305.6753894610.

The spelling of 28561527 in words is "twenty-eight million, five hundred sixty-one thousand, five hundred twenty-seven".