16389394 has 16 divisors (see below), whose sum is σ = 29749248. Its totient is φ = 6610752.

The previous prime is 16389383. The next prime is 16389403. The reversal of 16389394 is 49398361.

It is a super-2 number, since 2×16389394² = 537224471374472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16389394.

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 in 7 ways as a sum of consecutive naturals, for example, 34194 + ... + 34669.

It is an arithmetic number, because the mean of its divisors is an integer number (1859328).

Almost surely, 2^16389394 is an apocalyptic number.

16389394 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

16389394 is a deficient number, since it is larger than the sum of its proper divisors (13359854).

16389394 is a wasteful number, since it uses less digits than its factorization.

16389394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68889.

The product of its digits is 139968, while the sum is 43.

The square root of 16389394 is about 4048.3816519691. The cubic root of 16389394 is about 254.0120377869.

The spelling of 16389394 in words is "sixteen million, three hundred eighty-nine thousand, three hundred ninety-four".