28671751 has 8 divisors (see below), whose sum is σ = 29458800. Its totient is φ = 27888960.

The previous prime is 28671733. The next prime is 28671757. The reversal of 28671751 is 15717682.

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 28671751 - 2¹¹ = 28669703 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28671751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28671757) 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, 16345 + ... + 18013.

It is an arithmetic number, because the mean of its divisors is an integer number (3682350).

Almost surely, 2^28671751 is an apocalyptic number.

28671751 is a deficient number, since it is larger than the sum of its proper divisors (787049).

28671751 is a wasteful number, since it uses less digits than its factorization.

28671751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129.

The product of its digits is 23520, while the sum is 37.

The square root of 28671751 is about 5354.6009188361. The cubic root of 28671751 is about 306.0681032294.

The spelling of 28671751 in words is "twenty-eight million, six hundred seventy-one thousand, seven hundred fifty-one".