16640352 has 72 divisors (see below), whose sum is σ = 49827960. Its totient is φ = 5253120.

The previous prime is 16640347. The next prime is 16640353. The reversal of 16640352 is 25304661.

16640352 is a `hidden beast` number, since 16 + 640 + 3 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16640353) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3952 + ... + 6992.

It is an arithmetic number, because the mean of its divisors is an integer number (692055).

Almost surely, 2^16640352 is an apocalyptic number.

16640352 is a gapful number since it is divisible by the number (12) 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 16640352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24913980).

16640352 is an abundant number, since it is smaller than the sum of its proper divisors (33187608).

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

16640352 is a wasteful number, since it uses less digits than its factorization.

16640352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3076 (or 3065 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 16640352 is about 4079.2587561958. The cubic root of 16640352 is about 255.3019721352.

The spelling of 16640352 in words is "sixteen million, six hundred forty thousand, three hundred fifty-two".