17728142 has 8 divisors (see below), whose sum is σ = 26611416. Its totient is φ = 8857672.

The previous prime is 17728141. The next prime is 17728157. The reversal of 17728142 is 24182771.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 17728099 and 17728108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17728141) 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, 1868 + ... + 6240.

It is an arithmetic number, because the mean of its divisors is an integer number (3326427).

Almost surely, 2^17728142 is an apocalyptic number.

17728142 is a deficient number, since it is larger than the sum of its proper divisors (8883274).

17728142 is a wasteful number, since it uses less digits than its factorization.

17728142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6402.

The product of its digits is 6272, while the sum is 32.

The square root of 17728142 is about 4210.4800201402. The cubic root of 17728142 is about 260.7480527943.

The spelling of 17728142 in words is "seventeen million, seven hundred twenty-eight thousand, one hundred forty-two".