28734717 has 12 divisors (see below), whose sum is σ = 42113120. Its totient is φ = 17414760.

The previous prime is 28734703. The next prime is 28734733. The reversal of 28734717 is 71743782.

It is not a de Polignac number, because 28734717 - 2⁴ = 28734701 is a prime.

It is a super-2 number, since 2×28734717² = 1651367922140178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28734787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39217 + ... + 39942.

Almost surely, 2^28734717 is an apocalyptic number.

It is an amenable number.

28734717 is a deficient number, since it is larger than the sum of its proper divisors (13378403).

28734717 is a wasteful number, since it uses less digits than its factorization.

28734717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79184 (or 79173 counting only the distinct ones).

The product of its digits is 65856, while the sum is 39.

The square root of 28734717 is about 5360.4773108372. The cubic root of 28734717 is about 306.2919913544.

The spelling of 28734717 in words is "twenty-eight million, seven hundred thirty-four thousand, seven hundred seventeen".