28610865 has 48 divisors (see below), whose sum is σ = 52852800. Its totient is φ = 14276736.

The previous prime is 28610863. The next prime is 28610887. The reversal of 28610865 is 56801682.

It is a happy number.

It is not a de Polignac number, because 28610865 - 2¹ = 28610863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28610863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 93042 + ... + 93348.

It is an arithmetic number, because the mean of its divisors is an integer number (1101100).

Almost surely, 2^28610865 is an apocalyptic number.

It is an amenable number.

28610865 is a deficient number, since it is larger than the sum of its proper divisors (24241935).

28610865 is a wasteful number, since it uses less digits than its factorization.

28610865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446 (or 443 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 28610865 is about 5348.9125062951. The cubic root of 28610865 is about 305.8512990178.

The spelling of 28610865 in words is "twenty-eight million, six hundred ten thousand, eight hundred sixty-five".