28719338 has 8 divisors (see below), whose sum is σ = 44564580. Its totient is φ = 13864480.

The previous prime is 28719331. The next prime is 28719343. The reversal of 28719338 is 83391782.

It can be written as a sum of positive squares in 2 ways, for example, as 28121809 + 597529 = 5303^2 + 773^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28719295 and 28719304.

It is not an unprimeable number, because it can be changed into a prime (28719331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247523 + ... + 247638.

Almost surely, 2^28719338 is an apocalyptic number.

28719338 is a deficient number, since it is larger than the sum of its proper divisors (15845242).

28719338 is a wasteful number, since it uses less digits than its factorization.

28719338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495192.

The product of its digits is 72576, while the sum is 41.

The square root of 28719338 is about 5359.0426383823. The cubic root of 28719338 is about 306.2373384742.

The spelling of 28719338 in words is "twenty-eight million, seven hundred nineteen thousand, three hundred thirty-eight".