28680757 has 8 divisors (see below), whose sum is σ = 33267776. Its totient is φ = 24216192.

The previous prime is 28680749. The next prime is 28680761. The reversal of 28680757 is 75708682.

It is a happy number.

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

It is not a de Polignac number, because 28680757 - 2³ = 28680749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28680257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30108 + ... + 31045.

It is an arithmetic number, because the mean of its divisors is an integer number (4158472).

Almost surely, 2^28680757 is an apocalyptic number.

It is an amenable number.

28680757 is a deficient number, since it is larger than the sum of its proper divisors (4587019).

28680757 is an equidigital number, since it uses as much as digits as its factorization.

28680757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61227.

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 28680757 is about 5355.4418118396. The cubic root of 28680757 is about 306.1001459274.

The spelling of 28680757 in words is "twenty-eight million, six hundred eighty thousand, seven hundred fifty-seven".