28306104 has 16 divisors (see below), whose sum is σ = 70765320. Its totient is φ = 9435360.

The previous prime is 28306039. The next prime is 28306111. The reversal of 28306104 is 40160382.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 1179421 = 28306104 / (2 + 8 + 3 + 0 + 6 + 1 + 0 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 589687 + ... + 589734.

Almost surely, 2^28306104 is an apocalyptic number.

28306104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28306104 is an abundant number, since it is smaller than the sum of its proper divisors (42459216).

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

28306104 is a wasteful number, since it uses less digits than its factorization.

28306104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179430 (or 1179426 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 28306104 is about 5320.3481089117. The cubic root of 28306104 is about 304.7614510255.

Adding to 28306104 its reverse (40160382), we get a palindrome (68466486).

The spelling of 28306104 in words is "twenty-eight million, three hundred six thousand, one hundred four".