28449104 has 10 divisors (see below), whose sum is σ = 55120170. Its totient is φ = 14224544.

The previous prime is 28449097. The next prime is 28449133. The reversal of 28449104 is 40194482.

It can be written as a sum of positive squares in only one way, i.e., 20720704 + 7728400 = 4552^2 + 2780^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 889019 + ... + 889050.

It is an arithmetic number, because the mean of its divisors is an integer number (5512017).

Almost surely, 2^28449104 is an apocalyptic number.

It is an amenable number.

28449104 is a deficient number, since it is larger than the sum of its proper divisors (26671066).

28449104 is a wasteful number, since it uses less digits than its factorization.

28449104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1778077 (or 1778071 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 28449104 is about 5333.7701487784. The cubic root of 28449104 is about 305.2737987488.

The spelling of 28449104 in words is "twenty-eight million, four hundred forty-nine thousand, one hundred four".