16320040 has 64 divisors (see below), whose sum is σ = 41472000. Its totient is φ = 5725440.

The previous prime is 16320037. The next prime is 16320047. The reversal of 16320040 is 4002361.

It is a junction number, because it is equal to n+sod(n) for n = 16319996 and 16320023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16320047) 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, 12121 + ... + 13399.

It is an arithmetic number, because the mean of its divisors is an integer number (648000).

Almost surely, 2^16320040 is an apocalyptic number.

16320040 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 16320040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20736000).

16320040 is an abundant number, since it is smaller than the sum of its proper divisors (25151960).

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

16320040 is a wasteful number, since it uses less digits than its factorization.

16320040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330 (or 1326 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 16320040 is about 4039.8069260795. The cubic root of 16320040 is about 253.6532354481.

The spelling of 16320040 in words is "sixteen million, three hundred twenty thousand, forty".