28969765 has 16 divisors (see below), whose sum is σ = 39574656. Its totient is φ = 20152000.

The previous prime is 28969763. The next prime is 28969769. The reversal of 28969765 is 56796982.

It is a happy number.

It is not a de Polignac number, because 28969765 - 2¹ = 28969763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28969763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10186 + ... + 12715.

It is an arithmetic number, because the mean of its divisors is an integer number (2473416).

Almost surely, 2^28969765 is an apocalyptic number.

It is an amenable number.

28969765 is a deficient number, since it is larger than the sum of its proper divisors (10604891).

28969765 is a wasteful number, since it uses less digits than its factorization.

28969765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22940.

The product of its digits is 1632960, while the sum is 52.

The square root of 28969765 is about 5382.3568257781. The cubic root of 28969765 is about 307.1248736026.

The spelling of 28969765 in words is "twenty-eight million, nine hundred sixty-nine thousand, seven hundred sixty-five".