28396279 has 16 divisors (see below), whose sum is σ = 31713280. Its totient is φ = 25310880.

The previous prime is 28396267. The next prime is 28396289. The reversal of 28396279 is 97269382.

It is not a de Polignac number, because 28396279 - 2²¹ = 26299127 is a prime.

It is a super-2 number, since 2×28396279² = 1612697322091682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28396259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21142 + ... + 22444.

It is an arithmetic number, because the mean of its divisors is an integer number (1982080).

Almost surely, 2^28396279 is an apocalyptic number.

28396279 is a deficient number, since it is larger than the sum of its proper divisors (3317001).

28396279 is a wasteful number, since it uses less digits than its factorization.

28396279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390.

The product of its digits is 326592, while the sum is 46.

The square root of 28396279 is about 5328.8159097496. The cubic root of 28396279 is about 305.0847350342.

The spelling of 28396279 in words is "twenty-eight million, three hundred ninety-six thousand, two hundred seventy-nine".