28535399 has 4 divisors (see below), whose sum is σ = 29306664. Its totient is φ = 27764136.

The previous prime is 28535393. The next prime is 28535411. The reversal of 28535399 is 99353582.

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 28535399 - 2⁴ = 28535383 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28535393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385577 + ... + 385650.

It is an arithmetic number, because the mean of its divisors is an integer number (7326666).

Almost surely, 2^28535399 is an apocalyptic number.

28535399 is a deficient number, since it is larger than the sum of its proper divisors (771265).

28535399 is an equidigital number, since it uses as much as digits as its factorization.

28535399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771264.

The product of its digits is 291600, while the sum is 44.

The square root of 28535399 is about 5341.8535172728. The cubic root of 28535399 is about 305.5821507111.

The spelling of 28535399 in words is "twenty-eight million, five hundred thirty-five thousand, three hundred ninety-nine".