28937399 has 12 divisors (see below), whose sum is σ = 30998160. Its totient is φ = 27004320.

The previous prime is 28937393. The next prime is 28937407. The reversal of 28937399 is 99373982.

It is not a de Polignac number, because 28937399 - 2⁸ = 28937143 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 (28937393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25067 + ... + 26195.

It is an arithmetic number, because the mean of its divisors is an integer number (2583180).

Almost surely, 2^28937399 is an apocalyptic number.

28937399 is a deficient number, since it is larger than the sum of its proper divisors (2060761).

28937399 is a wasteful number, since it uses less digits than its factorization.

28937399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238 (or 1219 counting only the distinct ones).

The product of its digits is 734832, while the sum is 50.

The square root of 28937399 is about 5379.3493100932. The cubic root of 28937399 is about 307.0104542200.

The spelling of 28937399 in words is "twenty-eight million, nine hundred thirty-seven thousand, three hundred ninety-nine".