28046917 has 4 divisors (see below), whose sum is σ = 28442016. Its totient is φ = 27651820.

The previous prime is 28046903. The next prime is 28046927. The reversal of 28046917 is 71964082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28046917 - 2⁷ = 28046789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28046927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197443 + ... + 197584.

It is an arithmetic number, because the mean of its divisors is an integer number (7110504).

Almost surely, 2^28046917 is an apocalyptic number.

It is an amenable number.

28046917 is a deficient number, since it is larger than the sum of its proper divisors (395099).

28046917 is an equidigital number, since it uses as much as digits as its factorization.

28046917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395098.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 28046917 is about 5295.9340063864. The cubic root of 28046917 is about 303.8284068846.

The spelling of 28046917 in words is "twenty-eight million, forty-six thousand, nine hundred seventeen".