28112104 has 8 divisors (see below), whose sum is σ = 52710210. Its totient is φ = 14056048.

The previous prime is 28112093. The next prime is 28112111. The reversal of 28112104 is 40121182.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 28111204 + 900 = 5302^2 + 30^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1756999 + ... + 1757014.

Almost surely, 2^28112104 is an apocalyptic number.

It is an amenable number.

28112104 is a deficient number, since it is larger than the sum of its proper divisors (24598106).

28112104 is a wasteful number, since it uses less digits than its factorization.

28112104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3514019 (or 3514015 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 28112104 is about 5302.0848729533. The cubic root of 28112104 is about 304.0636120345.

Adding to 28112104 its reverse (40121182), we get a palindrome (68233286).

The spelling of 28112104 in words is "twenty-eight million, one hundred twelve thousand, one hundred four".