28417679 has 4 divisors (see below), whose sum is σ = 28818000. Its totient is φ = 28017360.

The previous prime is 28417661. The next prime is 28417681. The reversal of 28417679 is 97671482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97671482 = 2 ⋅48835741.

It is a cyclic number.

It is not a de Polignac number, because 28417679 - 2¹⁶ = 28352143 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 (28417619) 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, 200054 + ... + 200195.

It is an arithmetic number, because the mean of its divisors is an integer number (7204500).

Almost surely, 2^28417679 is an apocalyptic number.

28417679 is a deficient number, since it is larger than the sum of its proper divisors (400321).

28417679 is an equidigital number, since it uses as much as digits as its factorization.

28417679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400320.

The product of its digits is 169344, while the sum is 44.

The square root of 28417679 is about 5330.8234823524. The cubic root of 28417679 is about 305.1613550958.

The spelling of 28417679 in words is "twenty-eight million, four hundred seventeen thousand, six hundred seventy-nine".