28552769 has 8 divisors (see below), whose sum is σ = 33427968. Its totient is φ = 23876640.

The previous prime is 28552753. The next prime is 28552793. The reversal of 28552769 is 96725582.

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 28552769 - 2⁴ = 28552753 is a prime.

It is a super-2 number, since 2×28552769² = 1630521235134722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28552739) 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, 49457 + ... + 50030.

It is an arithmetic number, because the mean of its divisors is an integer number (4178496).

Almost surely, 2^28552769 is an apocalyptic number.

It is an amenable number.

28552769 is a deficient number, since it is larger than the sum of its proper divisors (4875199).

28552769 is an equidigital number, since it uses as much as digits as its factorization.

28552769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99535.

The product of its digits is 302400, while the sum is 44.

The square root of 28552769 is about 5343.4791100930. The cubic root of 28552769 is about 305.6441425469.

The spelling of 28552769 in words is "twenty-eight million, five hundred fifty-two thousand, seven hundred sixty-nine".