28717827 has 8 divisors (see below), whose sum is σ = 38512464. Its totient is φ = 19034208.

The previous prime is 28717807. The next prime is 28717847. The reversal of 28717827 is 72871782.

It is an interprime number because it is at equal distance from previous prime (28717807) and next prime (28717847).

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

It is not a de Polignac number, because 28717827 - 2⁷ = 28717699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28717807) 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, 27148 + ... + 28185.

It is an arithmetic number, because the mean of its divisors is an integer number (4814058).

Almost surely, 2^28717827 is an apocalyptic number.

28717827 is a deficient number, since it is larger than the sum of its proper divisors (9794637).

28717827 is a wasteful number, since it uses less digits than its factorization.

28717827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55509.

The product of its digits is 87808, while the sum is 42.

The square root of 28717827 is about 5358.9016598553. The cubic root of 28717827 is about 306.2319677290.

The spelling of 28717827 in words is "twenty-eight million, seven hundred seventeen thousand, eight hundred twenty-seven".