16401140 has 48 divisors (see below), whose sum is σ = 39631872. Its totient is φ = 5584896.

The previous prime is 16401137. The next prime is 16401149. The reversal of 16401140 is 4110461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16401149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26717 + ... + 27323.

It is an arithmetic number, because the mean of its divisors is an integer number (825664).

Almost surely, 2^16401140 is an apocalyptic number.

16401140 is a gapful number since it is divisible by the number (10) 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 16401140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19815936).

16401140 is an abundant number, since it is smaller than the sum of its proper divisors (23230732).

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

16401140 is a wasteful number, since it uses less digits than its factorization.

16401140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816 (or 814 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 16401140 is about 4049.8320952849. The cubic root of 16401140 is about 254.0727053322.

The spelling of 16401140 in words is "sixteen million, four hundred one thousand, one hundred forty".