16338640 has 20 divisors (see below), whose sum is σ = 37987524. Its totient is φ = 6535424.

The previous prime is 16338607. The next prime is 16338703. The reversal of 16338640 is 4683361.

It can be written as a sum of positive squares in 2 ways, for example, as 7974976 + 8363664 = 2824^2 + 2892^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 102037 + ... + 102196.

Almost surely, 2^16338640 is an apocalyptic number.

16338640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16338640 is an abundant number, since it is smaller than the sum of its proper divisors (21648884).

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

16338640 is a wasteful number, since it uses less digits than its factorization.

16338640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204246 (or 204240 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 16338640 is about 4042.1083607444. The cubic root of 16338640 is about 253.7495619881.

The spelling of 16338640 in words is "sixteen million, three hundred thirty-eight thousand, six hundred forty".