18728414 has 8 divisors (see below), whose sum is σ = 29571240. Its totient is φ = 8871336.

The previous prime is 18728399. The next prime is 18728447. The reversal of 18728414 is 41482781.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246389 + ... + 246464.

It is an arithmetic number, because the mean of its divisors is an integer number (3696405).

Almost surely, 2^18728414 is an apocalyptic number.

18728414 is a deficient number, since it is larger than the sum of its proper divisors (10842826).

18728414 is a wasteful number, since it uses less digits than its factorization.

18728414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492874.

The product of its digits is 14336, while the sum is 35.

The square root of 18728414 is about 4327.6337645415. The cubic root of 18728414 is about 265.5626540459.

The spelling of 18728414 in words is "eighteen million, seven hundred twenty-eight thousand, four hundred fourteen".