28587747 has 8 divisors (see below), whose sum is σ = 38494800. Its totient is φ = 18869600.

The previous prime is 28587721. The next prime is 28587751. The reversal of 28587747 is 74778582.

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 28587747 - 2⁸ = 28587491 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28587696 and 28587705.

It is not an unprimeable number, because it can be changed into a prime (28587787) 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, 46872 + ... + 47477.

It is an arithmetic number, because the mean of its divisors is an integer number (4811850).

Almost surely, 2^28587747 is an apocalyptic number.

28587747 is a deficient number, since it is larger than the sum of its proper divisors (9907053).

28587747 is a wasteful number, since it uses less digits than its factorization.

28587747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94453.

The product of its digits is 878080, while the sum is 48.

The square root of 28587747 is about 5346.7510695749. The cubic root of 28587747 is about 305.7688993701.

The spelling of 28587747 in words is "twenty-eight million, five hundred eighty-seven thousand, seven hundred forty-seven".