18057398 has 4 divisors (see below), whose sum is σ = 27086100. Its totient is φ = 9028698.

The previous prime is 18057379. The next prime is 18057419. The reversal of 18057398 is 89375081.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4514348 + ... + 4514351.

It is an arithmetic number, because the mean of its divisors is an integer number (6771525).

Almost surely, 2^18057398 is an apocalyptic number.

18057398 is a deficient number, since it is larger than the sum of its proper divisors (9028702).

18057398 is an equidigital number, since it uses as much as digits as its factorization.

18057398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9028701.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 18057398 is about 4249.3997223137. The cubic root of 18057398 is about 262.3524092472.

The spelling of 18057398 in words is "eighteen million, fifty-seven thousand, three hundred ninety-eight".