28707 has 8 divisors (see below), whose sum is σ = 43776. Its totient is φ = 16392.

The previous prime is 28703. The next prime is 28711. The reversal of 28707 is 70782.

It is an interprime number because it is at equal distance from previous prime (28703) and next prime (28711).

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

It is not a de Polignac number, because 28707 - 2² = 28703 is a prime.

28707 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 28707.

It is not an unprimeable number, because it can be changed into a prime (28703) 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, 663 + ... + 704.

It is an arithmetic number, because the mean of its divisors is an integer number (5472).

2²⁸⁷⁰⁷ is an apocalyptic number.

28707 is a deficient number, since it is larger than the sum of its proper divisors (15069).

28707 is a wasteful number, since it uses less digits than its factorization.

28707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377.

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 28707 is about 169.4314020481. The cubic root of 28707 is about 30.6193478393.

The spelling of 28707 in words is "twenty-eight thousand, seven hundred seven".