28372319 has 4 divisors (see below), whose sum is σ = 28447560. Its totient is φ = 28297080.

The previous prime is 28372313. The next prime is 28372321. The reversal of 28372319 is 91327382.

28372319 is nontrivially palindromic in base 14.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91327382 = 2 ⋅45663691.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28372319 is a prime.

It is a super-2 number, since 2×28372319² = 1609976970875522, 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 (28372313) 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, 37052 + ... + 37809.

It is an arithmetic number, because the mean of its divisors is an integer number (7111890).

Almost surely, 2^28372319 is an apocalyptic number.

28372319 is a deficient number, since it is larger than the sum of its proper divisors (75241).

28372319 is an equidigital number, since it uses as much as digits as its factorization.

28372319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75240.

The product of its digits is 18144, while the sum is 35.

The square root of 28372319 is about 5326.5672810920. The cubic root of 28372319 is about 304.9989035166.

The spelling of 28372319 in words is "twenty-eight million, three hundred seventy-two thousand, three hundred nineteen".