28743017 has 8 divisors (see below), whose sum is σ = 29379072. Its totient is φ = 28112400.

The previous prime is 28742977. The next prime is 28743037. The reversal of 28743017 is 71034782.

It is a happy number.

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 28743017 - 2⁸ = 28742761 is a prime.

It is a super-2 number, since 2×28743017² = 1652322052524578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28743037) 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, 10418 + ... + 12884.

It is an arithmetic number, because the mean of its divisors is an integer number (3672384).

Almost surely, 2^28743017 is an apocalyptic number.

It is an amenable number.

28743017 is a deficient number, since it is larger than the sum of its proper divisors (636055).

28743017 is a wasteful number, since it uses less digits than its factorization.

28743017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2719.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 28743017 is about 5361.2514397293. The cubic root of 28743017 is about 306.3214792476.

Adding to 28743017 its reverse (71034782), we get a palindrome (99777799).

The spelling of 28743017 in words is "twenty-eight million, seven hundred forty-three thousand, seventeen".