16321140 has 72 divisors (see below), whose sum is σ = 54014688. Its totient is φ = 3956160.

The previous prime is 16321127. The next prime is 16321169. The reversal of 16321140 is 4112361.

It is a happy number.

16321140 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×16321140² = 532759221799200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2142 + ... + 6101.

It is an arithmetic number, because the mean of its divisors is an integer number (750204).

Almost surely, 2^16321140 is an apocalyptic number.

16321140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16321140 is an abundant number, since it is smaller than the sum of its proper divisors (37693548).

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

16321140 is a wasteful number, since it uses less digits than its factorization.

16321140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8269 (or 8264 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 16321140 is about 4039.9430689058. The cubic root of 16321140 is about 253.6589342146.

It can be divided in two parts, 16321 and 140, that added together give a palindrome (16461).

The spelling of 16321140 in words is "sixteen million, three hundred twenty-one thousand, one hundred forty".