28806319 has 8 divisors (see below), whose sum is σ = 29296800. Its totient is φ = 28320096.

The previous prime is 28806293. The next prime is 28806361. The reversal of 28806319 is 91360882.

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 28806319 - 2¹⁵ = 28773551 is a prime.

It is a super-2 number, since 2×28806319² = 1659608028659522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28806389) 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, 14409 + ... + 16285.

It is an arithmetic number, because the mean of its divisors is an integer number (3662100).

Almost surely, 2^28806319 is an apocalyptic number.

28806319 is a deficient number, since it is larger than the sum of its proper divisors (490481).

28806319 is a wasteful number, since it uses less digits than its factorization.

28806319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 28806319 is about 5367.1518517739. The cubic root of 28806319 is about 306.5461894167.

The spelling of 28806319 in words is "twenty-eight million, eight hundred six thousand, three hundred nineteen".