16388393 has 24 divisors (see below), whose sum is σ = 20793600. Its totient is φ = 12827808.

The previous prime is 16388381. The next prime is 16388413. The reversal of 16388393 is 39388361.

16388393 = 8⁵ + 9⁵ + ... + 21⁵.

It is not a de Polignac number, because 16388393 - 2⁴ = 16388377 is a prime.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 16388393.

It is not an unprimeable number, because it can be changed into a prime (16388093) 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 23 ways as a sum of consecutive naturals, for example, 26696 + ... + 27302.

It is an arithmetic number, because the mean of its divisors is an integer number (866400).

Almost surely, 2^16388393 is an apocalyptic number.

It is an amenable number.

16388393 is a deficient number, since it is larger than the sum of its proper divisors (4405207).

16388393 is a wasteful number, since it uses less digits than its factorization.

16388393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669 (or 662 counting only the distinct ones).

The product of its digits is 93312, while the sum is 41.

The square root of 16388393 is about 4048.2580204330. The cubic root of 16388393 is about 254.0068663281.

The spelling of 16388393 in words is "sixteen million, three hundred eighty-eight thousand, three hundred ninety-three".