16388028 has 48 divisors (see below), whose sum is σ = 43535520. Its totient is φ = 5328000.

The previous prime is 16388023. The next prime is 16388039. The reversal of 16388028 is 82088361.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 16387983 and 16388001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16388023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2578 + ... + 6278.

It is an arithmetic number, because the mean of its divisors is an integer number (906990).

Almost surely, 2^16388028 is an apocalyptic number.

16388028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16388028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21767760).

16388028 is an abundant number, since it is smaller than the sum of its proper divisors (27147492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16388028 is a wasteful number, since it uses less digits than its factorization.

16388028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3755 (or 3747 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 16388028 is about 4048.2129390634. The cubic root of 16388028 is about 254.0049805790.

The spelling of 16388028 in words is "sixteen million, three hundred eighty-eight thousand, twenty-eight".