28801399 has 8 divisors (see below), whose sum is σ = 31524480. Its totient is φ = 26095800.

The previous prime is 28801361. The next prime is 28801439. The reversal of 28801399 is 99310882.

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 28801399 - 2¹⁵ = 28768631 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 (28801319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 789 + ... + 7630.

It is an arithmetic number, because the mean of its divisors is an integer number (3940560).

Almost surely, 2^28801399 is an apocalyptic number.

28801399 is a deficient number, since it is larger than the sum of its proper divisors (2723081).

28801399 is a wasteful number, since it uses less digits than its factorization.

28801399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8741.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 28801399 is about 5366.6934885458. The cubic root of 28801399 is about 306.5287361497.

The spelling of 28801399 in words is "twenty-eight million, eight hundred one thousand, three hundred ninety-nine".