28929399 has 8 divisors (see below), whose sum is σ = 38733552. Its totient is φ = 19205760.

The previous prime is 28929391. The next prime is 28929413. The reversal of 28929399 is 99392982.

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

It is not a de Polignac number, because 28929399 - 2³ = 28929391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28929391) 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, 19284 + ... + 20729.

It is an arithmetic number, because the mean of its divisors is an integer number (4841694).

Almost surely, 2^28929399 is an apocalyptic number.

28929399 is a deficient number, since it is larger than the sum of its proper divisors (9804153).

28929399 is a wasteful number, since it uses less digits than its factorization.

28929399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40257.

The product of its digits is 629856, while the sum is 51.

The square root of 28929399 is about 5378.6056743361. The cubic root of 28929399 is about 306.9821596936.

The spelling of 28929399 in words is "twenty-eight million, nine hundred twenty-nine thousand, three hundred ninety-nine".