28408395 has 16 divisors (see below), whose sum is σ = 45522720. Its totient is φ = 15128064.

The previous prime is 28408379. The next prime is 28408397. The reversal of 28408395 is 59380482.

It is a happy number.

It is not a de Polignac number, because 28408395 - 2⁴ = 28408379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28408397) 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, 14197 + ... + 16073.

It is an arithmetic number, because the mean of its divisors is an integer number (2845170).

Almost surely, 2^28408395 is an apocalyptic number.

28408395 is a deficient number, since it is larger than the sum of its proper divisors (17114325).

28408395 is a wasteful number, since it uses less digits than its factorization.

28408395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2894.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 28408395 is about 5329.9526264311. The cubic root of 28408395 is about 305.1281196041.

The spelling of 28408395 in words is "twenty-eight million, four hundred eight thousand, three hundred ninety-five".