28153855 has 8 divisors (see below), whose sum is σ = 34697952. Its totient is φ = 21914208.

The previous prime is 28153841. The next prime is 28153889. The reversal of 28153855 is 55835182.

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 28153855 - 2⁵ = 28153823 is a prime.

It is a super-2 number, since 2×28153855² = 1585279102722050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75907 + ... + 76276.

It is an arithmetic number, because the mean of its divisors is an integer number (4337244).

Almost surely, 2^28153855 is an apocalyptic number.

28153855 is a deficient number, since it is larger than the sum of its proper divisors (6544097).

28153855 is a wasteful number, since it uses less digits than its factorization.

28153855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152225.

The product of its digits is 48000, while the sum is 37.

The square root of 28153855 is about 5306.0206369746. The cubic root of 28153855 is about 304.2140653809.

It can be divided in two parts, 2815 and 3855, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 28153855 in words is "twenty-eight million, one hundred fifty-three thousand, eight hundred fifty-five".