28293965 has 8 divisors (see below), whose sum is σ = 38803200. Its totient is φ = 19401552.

The previous prime is 28293959. The next prime is 28294031. The reversal of 28293965 is 56939282.

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 28293965 - 2²⁴ = 11516749 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404165 + ... + 404234.

It is an arithmetic number, because the mean of its divisors is an integer number (4850400).

Almost surely, 2^28293965 is an apocalyptic number.

It is an amenable number.

28293965 is a deficient number, since it is larger than the sum of its proper divisors (10509235).

28293965 is an equidigital number, since it uses as much as digits as its factorization.

28293965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808411.

The product of its digits is 233280, while the sum is 44.

The square root of 28293965 is about 5319.2071777663. The cubic root of 28293965 is about 304.7178794079.

The spelling of 28293965 in words is "twenty-eight million, two hundred ninety-three thousand, nine hundred sixty-five".