28338378 has 24 divisors (see below), whose sum is σ = 57367104. Its totient is φ = 9332400.

The previous prime is 28338361. The next prime is 28338379. The reversal of 28338378 is 87383382.

It is not an unprimeable number, because it can be changed into a prime (28338379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60975 + ... + 61437.

It is an arithmetic number, because the mean of its divisors is an integer number (2390296).

Almost surely, 2^28338378 is an apocalyptic number.

28338378 is an abundant number, since it is smaller than the sum of its proper divisors (29028726).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28338378 is a wasteful number, since it uses less digits than its factorization.

28338378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670 (or 569 counting only the distinct ones).

The product of its digits is 193536, while the sum is 42.

The square root of 28338378 is about 5323.3803170542. The cubic root of 28338378 is about 304.8772344766.

It can be divided in two parts, 2833 and 8378, that added together give a palindrome (11211).

The spelling of 28338378 in words is "twenty-eight million, three hundred thirty-eight thousand, three hundred seventy-eight".