28408394 has 16 divisors (see below), whose sum is σ = 51565248. Its totient is φ = 11458752.

The previous prime is 28408379. The next prime is 28408397. The reversal of 28408394 is 49380482.

It is not an unprimeable number, because it can be changed into a prime (28408397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59444 + ... + 59919.

It is an arithmetic number, because the mean of its divisors is an integer number (3222828).

Almost surely, 2^28408394 is an apocalyptic number.

28408394 is a deficient number, since it is larger than the sum of its proper divisors (23156854).

28408394 is a wasteful number, since it uses less digits than its factorization.

28408394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119389.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 28408394 is about 5329.9525326217. The cubic root of 28408394 is about 305.1281160238.

The spelling of 28408394 in words is "twenty-eight million, four hundred eight thousand, three hundred ninety-four".