28753747 has 4 divisors (see below), whose sum is σ = 31367736. Its totient is φ = 26139760.

The previous prime is 28753729. The next prime is 28753757. The reversal of 28753747 is 74735782.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28753747 - 2⁷ = 28753619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28753717) 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 3 ways as a sum of consecutive naturals, for example, 1306978 + ... + 1306999.

It is an arithmetic number, because the mean of its divisors is an integer number (7841934).

Almost surely, 2^28753747 is an apocalyptic number.

28753747 is a deficient number, since it is larger than the sum of its proper divisors (2613989).

28753747 is a wasteful number, since it uses less digits than its factorization.

28753747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2613988.

The product of its digits is 329280, while the sum is 43.

The square root of 28753747 is about 5362.2520455495. The cubic root of 28753747 is about 306.3595919314.

The spelling of 28753747 in words is "twenty-eight million, seven hundred fifty-three thousand, seven hundred forty-seven".