28100664 has 96 divisors (see below), whose sum is σ = 80870400. Its totient is φ = 8796480.

The previous prime is 28100659. The next prime is 28100707. The reversal of 28100664 is 46600182.

28100664 is nontrivially palindromic in base 7.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117457 + ... + 117695.

It is an arithmetic number, because the mean of its divisors is an integer number (842400).

Almost surely, 2^28100664 is an apocalyptic number.

28100664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28100664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40435200).

28100664 is an abundant number, since it is smaller than the sum of its proper divisors (52769736).

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

28100664 is a wasteful number, since it uses less digits than its factorization.

28100664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 28100664 is about 5301.0059422717. The cubic root of 28100664 is about 304.0223610052.

The spelling of 28100664 in words is "twenty-eight million, one hundred thousand, six hundred sixty-four".