18128297 has 8 divisors (see below), whose sum is σ = 19881120. Its totient is φ = 16392960.

The previous prime is 18128287. The next prime is 18128311. The reversal of 18128297 is 79282181.

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 18128297 - 2¹² = 18124201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18128297.

It is not an unprimeable number, because it can be changed into a prime (18128207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2147 + ... + 6392.

It is an arithmetic number, because the mean of its divisors is an integer number (2485140).

Almost surely, 2^18128297 is an apocalyptic number.

It is an amenable number.

18128297 is a deficient number, since it is larger than the sum of its proper divisors (1752823).

18128297 is a wasteful number, since it uses less digits than its factorization.

18128297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8743.

The product of its digits is 16128, while the sum is 38.

The square root of 18128297 is about 4257.7337868871. The cubic root of 18128297 is about 262.6953200882.

The spelling of 18128297 in words is "eighteen million, one hundred twenty-eight thousand, two hundred ninety-seven".