18728006 has 8 divisors (see below), whose sum is σ = 30645864. Its totient is φ = 8512720.

The previous prime is 18727991. The next prime is 18728009. The reversal of 18728006 is 60082781.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18728009) 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 3 ways as a sum of consecutive naturals, for example, 425615 + ... + 425658.

It is an arithmetic number, because the mean of its divisors is an integer number (3830733).

Almost surely, 2^18728006 is an apocalyptic number.

18728006 is a deficient number, since it is larger than the sum of its proper divisors (11917858).

18728006 is a wasteful number, since it uses less digits than its factorization.

18728006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851286.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 18728006 is about 4327.5866253606. The cubic root of 18728006 is about 265.5607255973.

The spelling of 18728006 in words is "eighteen million, seven hundred twenty-eight thousand, six".