28747757 has 8 divisors (see below), whose sum is σ = 30120192. Its totient is φ = 27403200.

The previous prime is 28747717. The next prime is 28747759. The reversal of 28747757 is 75774782.

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 28747757 - 2⁸ = 28747501 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 (28747759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4844 + ... + 8997.

It is an arithmetic number, because the mean of its divisors is an integer number (3765024).

Almost surely, 2^28747757 is an apocalyptic number.

It is an amenable number.

28747757 is a deficient number, since it is larger than the sum of its proper divisors (1372435).

28747757 is a wasteful number, since it uses less digits than its factorization.

28747757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13939.

The product of its digits is 768320, while the sum is 47.

The square root of 28747757 is about 5361.6934824736. The cubic root of 28747757 is about 306.3383167749.

It can be divided in two parts, 2874775 and 7, that added together give a palindrome (2874782).

The spelling of 28747757 in words is "twenty-eight million, seven hundred forty-seven thousand, seven hundred fifty-seven".