28101404 has 12 divisors (see below), whose sum is σ = 49221984. Its totient is φ = 14037984.

The previous prime is 28101401. The next prime is 28101421. The reversal of 28101404 is 40410182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28101401) 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 3 ways as a sum of consecutive naturals, for example, 3224 + ... + 8160.

It is an arithmetic number, because the mean of its divisors is an integer number (4101832).

Almost surely, 2^28101404 is an apocalyptic number.

It is an amenable number.

28101404 is a deficient number, since it is larger than the sum of its proper divisors (21120580).

28101404 is a wasteful number, since it uses less digits than its factorization.

28101404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6364 (or 6362 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 28101404 is about 5301.0757398853. The cubic root of 28101404 is about 304.0250296797.

Adding to 28101404 its reverse (40410182), we get a palindrome (68511586).

The spelling of 28101404 in words is "twenty-eight million, one hundred one thousand, four hundred four".