28457417 has 4 divisors (see below), whose sum is σ = 29694720. Its totient is φ = 27220116.

The previous prime is 28457413. The next prime is 28457423. The reversal of 28457417 is 71475482.

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 28457417 - 2² = 28457413 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28457413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 618617 + ... + 618662.

It is an arithmetic number, because the mean of its divisors is an integer number (7423680).

Almost surely, 2^28457417 is an apocalyptic number.

It is an amenable number.

28457417 is a deficient number, since it is larger than the sum of its proper divisors (1237303).

28457417 is a wasteful number, since it uses less digits than its factorization.

28457417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237302.

The product of its digits is 62720, while the sum is 38.

The square root of 28457417 is about 5334.5493717839. The cubic root of 28457417 is about 305.3035301356.

The spelling of 28457417 in words is "twenty-eight million, four hundred fifty-seven thousand, four hundred seventeen".