28669965 has 16 divisors (see below), whose sum is σ = 45957888. Its totient is φ = 15262016.

The previous prime is 28669919. The next prime is 28669967. The reversal of 28669965 is 56996682.

It is a cyclic number.

It is not a de Polignac number, because 28669965 - 2⁹ = 28669453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28669967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8332 + ... + 11258.

It is an arithmetic number, because the mean of its divisors is an integer number (2872368).

Almost surely, 2^28669965 is an apocalyptic number.

It is an amenable number.

28669965 is a deficient number, since it is larger than the sum of its proper divisors (17287923).

28669965 is a wasteful number, since it uses less digits than its factorization.

28669965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3588.

The product of its digits is 1399680, while the sum is 51.

The square root of 28669965 is about 5354.4341437728. The cubic root of 28669965 is about 306.0617479730.

The spelling of 28669965 in words is "twenty-eight million, six hundred sixty-nine thousand, nine hundred sixty-five".