28040965 has 8 divisors (see below), whose sum is σ = 33914880. Its totient is φ = 22255632.

The previous prime is 28040959. The next prime is 28040977. The reversal of 28040965 is 56904082.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28040965 - 2¹⁹ = 27516677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28040965.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21445 + ... + 22714.

It is an arithmetic number, because the mean of its divisors is an integer number (4239360).

Almost surely, 2^28040965 is an apocalyptic number.

It is an amenable number.

28040965 is a deficient number, since it is larger than the sum of its proper divisors (5873915).

28040965 is a wasteful number, since it uses less digits than its factorization.

28040965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44291.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 28040965 is about 5295.3720360330. The cubic root of 28040965 is about 303.8069129641.

The spelling of 28040965 in words is "twenty-eight million, forty thousand, nine hundred sixty-five".