28118147 has 8 divisors (see below), whose sum is σ = 29140992. Its totient is φ = 27102600.

The previous prime is 28118141. The next prime is 28118149. The reversal of 28118147 is 74181182.

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 28118147 - 2⁴ = 28118131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28118141) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6728 + ... + 10074.

It is an arithmetic number, because the mean of its divisors is an integer number (3642624).

Almost surely, 2^28118147 is an apocalyptic number.

28118147 is a deficient number, since it is larger than the sum of its proper divisors (1022845).

28118147 is a wasteful number, since it uses less digits than its factorization.

28118147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3649.

The product of its digits is 3584, while the sum is 32.

The square root of 28118147 is about 5302.6547125001. The cubic root of 28118147 is about 304.0853977247.

The spelling of 28118147 in words is "twenty-eight million, one hundred eighteen thousand, one hundred forty-seven".