28669893 has 32 divisors (see below), whose sum is σ = 45619200. Its totient is φ = 15669696.

The previous prime is 28669877. The next prime is 28669897. The reversal of 28669893 is 39896682.

It is not a de Polignac number, because 28669893 - 2⁴ = 28669877 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28669897) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108880 + ... + 109142.

It is an arithmetic number, because the mean of its divisors is an integer number (1425600).

Almost surely, 2^28669893 is an apocalyptic number.

It is an amenable number.

28669893 is a deficient number, since it is larger than the sum of its proper divisors (16949307).

28669893 is a wasteful number, since it uses less digits than its factorization.

28669893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481.

The product of its digits is 1119744, while the sum is 51.

The square root of 28669893 is about 5354.4274203691. The cubic root of 28669893 is about 306.0614917645.

The spelling of 28669893 in words is "twenty-eight million, six hundred sixty-nine thousand, eight hundred ninety-three".