28653885 has 64 divisors (see below), whose sum is σ = 56851200. Its totient is φ = 13595904.

The previous prime is 28653871. The next prime is 28653893. The reversal of 28653885 is 58835682.

It is a happy number.

It is not a de Polignac number, because 28653885 - 2¹³ = 28645693 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28653885.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 50614 + ... + 51176.

It is an arithmetic number, because the mean of its divisors is an integer number (888300).

Almost surely, 2^28653885 is an apocalyptic number.

It is an amenable number.

28653885 is a deficient number, since it is larger than the sum of its proper divisors (28197315).

28653885 is a wasteful number, since it uses less digits than its factorization.

28653885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619 (or 613 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 28653885 is about 5352.9323739423. The cubic root of 28653885 is about 306.0045174266.

The spelling of 28653885 in words is "twenty-eight million, six hundred fifty-three thousand, eight hundred eighty-five".