28367919 has 12 divisors (see below), whose sum is σ = 41290392. Its totient is φ = 18766800.

The previous prime is 28367909. The next prime is 28367921. The reversal of 28367919 is 91976382.

It is not a de Polignac number, because 28367919 - 2⁴ = 28367903 is a prime.

It is a super-2 number, since 2×28367919² = 1609477656781122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28367909) 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, 10852 + ... + 13209.

It is an arithmetic number, because the mean of its divisors is an integer number (3440866).

Almost surely, 2^28367919 is an apocalyptic number.

28367919 is a deficient number, since it is larger than the sum of its proper divisors (12922473).

28367919 is a wasteful number, since it uses less digits than its factorization.

28367919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24198 (or 24195 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 28367919 is about 5326.1542411012. The cubic root of 28367919 is about 304.9831362171.

The spelling of 28367919 in words is "twenty-eight million, three hundred sixty-seven thousand, nine hundred nineteen".