28659904 has 168 divisors, whose sum is σ = 77022960. Its totient is φ = 10450944.

The previous prime is 28659901. The next prime is 28659937. The reversal of 28659904 is 40995682.

28659904 is nontrivially palindromic in base 3.

It is not an unprimeable number, because it can be changed into a prime (28659901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 774574 + ... + 774610.

It is an arithmetic number, because the mean of its divisors is an integer number (458470).

Almost surely, 2^28659904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28659904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38511480).

28659904 is an abundant number, since it is smaller than the sum of its proper divisors (48363056).

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

28659904 is a wasteful number, since it uses less digits than its factorization.

28659904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 28659904 is about 5353.4945596311. The cubic root of 28659904 is about 306.0259422379.

Adding to 28659904 its product of nonzero digits (155520), we get a square (28815424 = 5368²).

It can be divided in two parts, 2865 and 9904, that added together give a square (12769 = 113²).

The spelling of 28659904 in words is "twenty-eight million, six hundred fifty-nine thousand, nine hundred four".