28328577 has 8 divisors (see below), whose sum is σ = 37990464. Its totient is φ = 18776208.

The previous prime is 28328551. The next prime is 28328591. The reversal of 28328577 is 77582382.

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

It is not a de Polignac number, because 28328577 - 2¹⁰ = 28327553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28328527) 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, 26773 + ... + 27810.

It is an arithmetic number, because the mean of its divisors is an integer number (4748808).

Almost surely, 2^28328577 is an apocalyptic number.

It is an amenable number.

28328577 is a deficient number, since it is larger than the sum of its proper divisors (9661887).

28328577 is a wasteful number, since it uses less digits than its factorization.

28328577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54759.

The product of its digits is 188160, while the sum is 42.

The square root of 28328577 is about 5322.4596757514. The cubic root of 28328577 is about 304.8420825432.

The spelling of 28328577 in words is "twenty-eight million, three hundred twenty-eight thousand, five hundred seventy-seven".