28625566 has 8 divisors (see below), whose sum is σ = 43033680. Its totient is φ = 14281008.

The previous prime is 28625557. The next prime is 28625579. The reversal of 28625566 is 66552682.

It is a happy number.

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

It is a congruent number.

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, 14746 + ... + 16573.

It is an arithmetic number, because the mean of its divisors is an integer number (5379210).

Almost surely, 2^28625566 is an apocalyptic number.

28625566 is a deficient number, since it is larger than the sum of its proper divisors (14408114).

28625566 is a wasteful number, since it uses less digits than its factorization.

28625566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31778.

The product of its digits is 172800, while the sum is 40.

The square root of 28625566 is about 5350.2865343830. The cubic root of 28625566 is about 305.9036748088.

It can be divided in two parts, 286 and 25566, that added together give a palindrome (25852).

The spelling of 28625566 in words is "twenty-eight million, six hundred twenty-five thousand, five hundred sixty-six".