28719369 has 12 divisors (see below), whose sum is σ = 47409856. Its totient is φ = 16411032.

The previous prime is 28719343. The next prime is 28719373. The reversal of 28719369 is 96391782.

28719369 is a `hidden beast` number, since 287 + 1 + 9 + 369 = 666.

It is not a de Polignac number, because 28719369 - 2¹¹ = 28717321 is a prime.

It is a super-2 number, since 2×28719369² = 1649604311516322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28719319) 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, 227869 + ... + 227994.

Almost surely, 2^28719369 is an apocalyptic number.

It is an amenable number.

28719369 is a deficient number, since it is larger than the sum of its proper divisors (18690487).

28719369 is a wasteful number, since it uses less digits than its factorization.

28719369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455876 (or 455873 counting only the distinct ones).

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

The square root of 28719369 is about 5359.0455306892. The cubic root of 28719369 is about 306.2374486596.

The spelling of 28719369 in words is "twenty-eight million, seven hundred nineteen thousand, three hundred sixty-nine".