28137319 has 10 divisors (see below), whose sum is σ = 32827720. Its totient is φ = 24115644.

The previous prime is 28137311. The next prime is 28137341. The reversal of 28137319 is 91373182.

It is not a de Polignac number, because 28137319 - 2³ = 28137311 is a prime.

It is a super-2 number, since 2×28137319² = 1583417441015522, 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 (28137311) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3459 + ... + 8260.

It is an arithmetic number, because the mean of its divisors is an integer number (3282772).

Almost surely, 2^28137319 is an apocalyptic number.

28137319 is a deficient number, since it is larger than the sum of its proper divisors (4690401).

28137319 is an frugal number, since it uses more digits than its factorization.

28137319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11747 (or 11726 counting only the distinct ones).

The product of its digits is 9072, while the sum is 34.

The square root of 28137319 is about 5304.4621782043. The cubic root of 28137319 is about 304.1544942732.

The spelling of 28137319 in words is "twenty-eight million, one hundred thirty-seven thousand, three hundred nineteen".