28380110 has 64 divisors (see below), whose sum is σ = 60410880. Its totient is φ = 9486720.

The previous prime is 28380083. The next prime is 28380113. The reversal of 28380110 is 1108382.

It is a super-2 number, since 2×28380110² = 1610861287224200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28380113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77147 + ... + 77513.

It is an arithmetic number, because the mean of its divisors is an integer number (943920).

Almost surely, 2^28380110 is an apocalyptic number.

28380110 is an abundant number, since it is smaller than the sum of its proper divisors (32030770).

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

28380110 is a wasteful number, since it uses less digits than its factorization.

28380110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 28380110 is about 5327.2985649389. The cubic root of 28380110 is about 305.0268183889.

Adding to 28380110 its reverse (1108382), we get a palindrome (29488492).

The spelling of 28380110 in words is "twenty-eight million, three hundred eighty thousand, one hundred ten".