28757417 has 8 divisors (see below), whose sum is σ = 31011456. Its totient is φ = 26509392.

The previous prime is 28757389. The next prime is 28757419. The reversal of 28757417 is 71475782.

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

It is not a de Polignac number, because 28757417 - 2²⁰ = 27708841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28757419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16418 + ... + 18084.

It is an arithmetic number, because the mean of its divisors is an integer number (3876432).

Almost surely, 2^28757417 is an apocalyptic number.

It is an amenable number.

28757417 is a deficient number, since it is larger than the sum of its proper divisors (2254039).

28757417 is a wasteful number, since it uses less digits than its factorization.

28757417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3007.

The product of its digits is 109760, while the sum is 41.

The square root of 28757417 is about 5362.5942415961. The cubic root of 28757417 is about 306.3726255008.

The spelling of 28757417 in words is "twenty-eight million, seven hundred fifty-seven thousand, four hundred seventeen".