16308640 has 24 divisors (see below), whose sum is σ = 38529540. Its totient is φ = 6523392.

The previous prime is 16308637. The next prime is 16308641. The reversal of 16308640 is 4680361.

16308640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 15904144 + 404496 = 3988^2 + 636^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16308599 and 16308608.

It is not an unprimeable number, because it can be changed into a prime (16308641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50805 + ... + 51124.

Almost surely, 2^16308640 is an apocalyptic number.

16308640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16308640 is an abundant number, since it is smaller than the sum of its proper divisors (22220900).

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

16308640 is a wasteful number, since it uses less digits than its factorization.

16308640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101944 (or 101936 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 16308640 is about 4038.3957210754. The cubic root of 16308640 is about 253.5941604204.

The spelling of 16308640 in words is "sixteen million, three hundred eight thousand, six hundred forty".