28100855 has 8 divisors (see below), whose sum is σ = 34884000. Its totient is φ = 21705376.

The previous prime is 28100837. The next prime is 28100857. The reversal of 28100855 is 55800182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28100855 - 2⁸ = 28100599 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28100857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96755 + ... + 97044.

It is an arithmetic number, because the mean of its divisors is an integer number (4360500).

Almost surely, 2^28100855 is an apocalyptic number.

28100855 is a deficient number, since it is larger than the sum of its proper divisors (6783145).

28100855 is a wasteful number, since it uses less digits than its factorization.

28100855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193833.

The product of its (nonzero) digits is 3200, while the sum is 29.

The square root of 28100855 is about 5301.0239576897. The cubic root of 28100855 is about 304.0230498162.

The spelling of 28100855 in words is "twenty-eight million, one hundred thousand, eight hundred fifty-five".