28632565 has 8 divisors (see below), whose sum is σ = 37002168. Its totient is φ = 21144000.

The previous prime is 28632559. The next prime is 28632577. The reversal of 28632565 is 56523682.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 148996 + 28483569 = 386^2 + 5337^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28632565 - 2⁵ = 28632533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220186 + ... + 220315.

It is an arithmetic number, because the mean of its divisors is an integer number (4625271).

Almost surely, 2^28632565 is an apocalyptic number.

It is an amenable number.

28632565 is a deficient number, since it is larger than the sum of its proper divisors (8369603).

28632565 is a wasteful number, since it uses less digits than its factorization.

28632565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440519.

The product of its digits is 86400, while the sum is 37.

The square root of 28632565 is about 5350.9405715257. The cubic root of 28632565 is about 305.9286041016.

The spelling of 28632565 in words is "twenty-eight million, six hundred thirty-two thousand, five hundred sixty-five".