16027989 has 8 divisors (see below), whose sum is σ = 21591360. Its totient is φ = 10574976.

The previous prime is 16027969. The next prime is 16027997. The reversal of 16027989 is 98972061.

16027989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 16027989 - 2⁷ = 16027861 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16027989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16027909) 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, 27249 + ... + 27830.

It is an arithmetic number, because the mean of its divisors is an integer number (2698920).

Almost surely, 2^16027989 is an apocalyptic number.

It is an amenable number.

16027989 is a deficient number, since it is larger than the sum of its proper divisors (5563371).

16027989 is an equidigital number, since it uses as much as digits as its factorization.

16027989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55179.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 16027989 is about 4003.4970962897. The cubic root of 16027989 is about 252.1310574276.

It can be divided in two parts, 1602 and 7989, that added together give a triangular number (9591 = T₁₃₈).

The spelling of 16027989 in words is "sixteen million, twenty-seven thousand, nine hundred eighty-nine".