28369501 has 4 divisors (see below), whose sum is σ = 28850400. Its totient is φ = 27888604.

The previous prime is 28369477. The next prime is 28369513. The reversal of 28369501 is 10596382.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10596382 = 2 ⋅5298191.

It is a cyclic number.

It is not a de Polignac number, because 28369501 - 2¹³ = 28361309 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 (28369571) 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 3 ways as a sum of consecutive naturals, for example, 240361 + ... + 240478.

It is an arithmetic number, because the mean of its divisors is an integer number (7212600).

Almost surely, 2^28369501 is an apocalyptic number.

It is an amenable number.

28369501 is a deficient number, since it is larger than the sum of its proper divisors (480899).

28369501 is an equidigital number, since it uses as much as digits as its factorization.

28369501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480898.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 28369501 is about 5326.3027514403. The cubic root of 28369501 is about 304.9888054657.

The spelling of 28369501 in words is "twenty-eight million, three hundred sixty-nine thousand, five hundred one".