28669385 has 16 divisors (see below), whose sum is σ = 37791360. Its totient is φ = 20782080.

The previous prime is 28669369. The next prime is 28669393. The reversal of 28669385 is 58396682.

It is a happy number.

It is not a de Polignac number, because 28669385 - 2⁴ = 28669369 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4376 + ... + 8745.

It is an arithmetic number, because the mean of its divisors is an integer number (2361960).

Almost surely, 2^28669385 is an apocalyptic number.

It is an amenable number.

28669385 is a deficient number, since it is larger than the sum of its proper divisors (9121975).

28669385 is a wasteful number, since it uses less digits than its factorization.

28669385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13168.

The product of its digits is 622080, while the sum is 47.

The square root of 28669385 is about 5354.3799827805. The cubic root of 28669385 is about 306.0596840592.

The spelling of 28669385 in words is "twenty-eight million, six hundred sixty-nine thousand, three hundred eighty-five".