17428645 has 8 divisors (see below), whose sum is σ = 22523256. Its totient is φ = 12870336.

The previous prime is 17428637. The next prime is 17428667. The reversal of 17428645 is 54682471.

It can be written as a sum of positive squares in 4 ways, for example, as 1252161 + 16176484 = 1119^2 + 4022^2 .

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 17428645 - 2³ = 17428637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134002 + ... + 134131.

It is an arithmetic number, because the mean of its divisors is an integer number (2815407).

Almost surely, 2^17428645 is an apocalyptic number.

It is an amenable number.

17428645 is a deficient number, since it is larger than the sum of its proper divisors (5094611).

17428645 is a wasteful number, since it uses less digits than its factorization.

17428645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268151.

The product of its digits is 53760, while the sum is 37.

The square root of 17428645 is about 4174.7628675171. The cubic root of 17428645 is about 259.2713573430.

The spelling of 17428645 in words is "seventeen million, four hundred twenty-eight thousand, six hundred forty-five".