28752779 has 8 divisors (see below), whose sum is σ = 32378880. Its totient is φ = 25295400.

The previous prime is 28752769. The next prime is 28752793. The reversal of 28752779 is 97725782.

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 28752779 - 2⁸ = 28752523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28752709) 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, 41819 + ... + 42500.

It is an arithmetic number, because the mean of its divisors is an integer number (4047360).

Almost surely, 2^28752779 is an apocalyptic number.

28752779 is a deficient number, since it is larger than the sum of its proper divisors (3626101).

28752779 is a wasteful number, since it uses less digits than its factorization.

28752779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84361.

The product of its digits is 493920, while the sum is 47.

The square root of 28752779 is about 5362.1617842061. The cubic root of 28752779 is about 306.3561540095.

The spelling of 28752779 in words is "twenty-eight million, seven hundred fifty-two thousand, seven hundred seventy-nine".