28438894 has 16 divisors (see below), whose sum is σ = 47128320. Its totient is φ = 12762360.

The previous prime is 28438889. The next prime is 28438897. The reversal of 28438894 is 49883482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28438897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6444 + ... + 9919.

It is an arithmetic number, because the mean of its divisors is an integer number (2945520).

Almost surely, 2^28438894 is an apocalyptic number.

28438894 is a deficient number, since it is larger than the sum of its proper divisors (18689426).

28438894 is a wasteful number, since it uses less digits than its factorization.

28438894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16455.

The product of its digits is 442368, while the sum is 46.

The square root of 28438894 is about 5332.8129537796. The cubic root of 28438894 is about 305.2372748284.

It can be divided in two parts, 284388 and 94, that added together give a palindrome (284482).

The spelling of 28438894 in words is "twenty-eight million, four hundred thirty-eight thousand, eight hundred ninety-four".