18071928 has 96 divisors (see below), whose sum is σ = 58406400. Its totient is φ = 4935744.

The previous prime is 18071917. The next prime is 18071929. The reversal of 18071928 is 82917081.

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 = 18071892 and 18071901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18071929) 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, 10813 + ... + 12371.

It is an arithmetic number, because the mean of its divisors is an integer number (608400).

Almost surely, 2^18071928 is an apocalyptic number.

18071928 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 18071928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29203200).

18071928 is an abundant number, since it is smaller than the sum of its proper divisors (40334472).

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

18071928 is a wasteful number, since it uses less digits than its factorization.

18071928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601 (or 1594 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 18071928 is about 4251.1090317704. The cubic root of 18071928 is about 262.4227582259.

The spelling of 18071928 in words is "eighteen million, seventy-one thousand, nine hundred twenty-eight".