28718804 has 24 divisors (see below), whose sum is σ = 53084640. Its totient is φ = 13557024.

The previous prime is 28718801. The next prime is 28718821. The reversal of 28718804 is 40881782.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28718801) 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, 33242 + ... + 34094.

It is an arithmetic number, because the mean of its divisors is an integer number (2211860).

Almost surely, 2^28718804 is an apocalyptic number.

It is an amenable number.

28718804 is a deficient number, since it is larger than the sum of its proper divisors (24365836).

28718804 is a wasteful number, since it uses less digits than its factorization.

28718804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319 (or 1317 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 28718804 is about 5358.9928158190. The cubic root of 28718804 is about 306.2354404296.

It can be divided in two parts, 287 and 18804, that added together give a palindrome (19091).

The spelling of 28718804 in words is "twenty-eight million, seven hundred eighteen thousand, eight hundred four".