28735399 has 8 divisors (see below), whose sum is σ = 35826048. Its totient is φ = 22391160.

The previous prime is 28735397. The next prime is 28735403. The reversal of 28735399 is 99353782.

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

It is not a de Polignac number, because 28735399 - 2¹ = 28735397 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 (28735393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186517 + ... + 186670.

It is an arithmetic number, because the mean of its divisors is an integer number (4478256).

Almost surely, 2^28735399 is an apocalyptic number.

28735399 is a deficient number, since it is larger than the sum of its proper divisors (7090649).

28735399 is a wasteful number, since it uses less digits than its factorization.

28735399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373205.

The product of its digits is 408240, while the sum is 46.

The square root of 28735399 is about 5360.5409241979. The cubic root of 28735399 is about 306.2944145496.

The spelling of 28735399 in words is "twenty-eight million, seven hundred thirty-five thousand, three hundred ninety-nine".