18028347 has 16 divisors (see below), whose sum is σ = 25764480. Its totient is φ = 11172992.

The previous prime is 18028337. The next prime is 18028357. The reversal of 18028347 is 74382081.

It is an interprime number because it is at equal distance from previous prime (18028337) and next prime (18028357).

It is a cyclic number.

It is not a de Polignac number, because 18028347 - 2⁸ = 18028091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18028337) 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 15 ways as a sum of consecutive naturals, for example, 2104 + ... + 6362.

It is an arithmetic number, because the mean of its divisors is an integer number (1610280).

Almost surely, 2^18028347 is an apocalyptic number.

18028347 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

18028347 is a deficient number, since it is larger than the sum of its proper divisors (7736133).

18028347 is a wasteful number, since it uses less digits than its factorization.

18028347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4362.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 18028347 is about 4245.9800988700. The cubic root of 18028347 is about 262.2116416286.

The spelling of 18028347 in words is "eighteen million, twenty-eight thousand, three hundred forty-seven".