28710399 has 8 divisors (see below), whose sum is σ = 40532400. Its totient is φ = 18014336.

The previous prime is 28710391. The next prime is 28710413. The reversal of 28710399 is 99301782.

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 28710399 - 2³ = 28710391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28710391) 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, 281424 + ... + 281525.

It is an arithmetic number, because the mean of its divisors is an integer number (5066550).

Almost surely, 2^28710399 is an apocalyptic number.

28710399 is a deficient number, since it is larger than the sum of its proper divisors (11822001).

28710399 is a wasteful number, since it uses less digits than its factorization.

28710399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562969.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 28710399 is about 5358.2085625701. The cubic root of 28710399 is about 306.2055626764.

The spelling of 28710399 in words is "twenty-eight million, seven hundred ten thousand, three hundred ninety-nine".