28968819 has 8 divisors (see below), whose sum is σ = 42136512. Its totient is φ = 17556840.

The previous prime is 28968791. The next prime is 28968829. The reversal of 28968819 is 91886982.

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

It is not a de Polignac number, because 28968819 - 2⁷ = 28968691 is a prime.

It is a super-2 number, since 2×28968819² = 1678384948509522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28968829) 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, 438889 + ... + 438954.

It is an arithmetic number, because the mean of its divisors is an integer number (5267064).

Almost surely, 2^28968819 is an apocalyptic number.

28968819 is a deficient number, since it is larger than the sum of its proper divisors (13167693).

28968819 is a wasteful number, since it uses less digits than its factorization.

28968819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877857.

The product of its digits is 497664, while the sum is 51.

The square root of 28968819 is about 5382.2689453427. The cubic root of 28968819 is about 307.1215305391.

The spelling of 28968819 in words is "twenty-eight million, nine hundred sixty-eight thousand, eight hundred nineteen".