16800640 has 32 divisors (see below), whose sum is σ = 40165560. Its totient is φ = 6720000.

The previous prime is 16800631. The next prime is 16800653. The reversal of 16800640 is 4600861.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12486 + ... + 13765.

Almost surely, 2^16800640 is an apocalyptic number.

16800640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16800640 is an abundant number, since it is smaller than the sum of its proper divisors (23364920).

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

16800640 is an equidigital number, since it uses as much as digits as its factorization.

16800640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26270 (or 26258 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 16800640 is about 4098.8583776461. The cubic root of 16800640 is about 256.1190852207.

The spelling of 16800640 in words is "sixteen million, eight hundred thousand, six hundred forty".