16800780 has 24 divisors (see below), whose sum is σ = 47042352. Its totient is φ = 4480192.

The previous prime is 16800779. The next prime is 16800799. The reversal of 16800780 is 8700861.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 7 ways as a sum of consecutive naturals, for example, 139947 + ... + 140066.

It is an arithmetic number, because the mean of its divisors is an integer number (1960098).

Almost surely, 2^16800780 is an apocalyptic number.

16800780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16800780 is an abundant number, since it is smaller than the sum of its proper divisors (30241572).

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

16800780 is a wasteful number, since it uses less digits than its factorization.

16800780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280025 (or 280023 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 16800780 is about 4098.8754555366. The cubic root of 16800780 is about 256.1197966336.

The spelling of 16800780 in words is "sixteen million, eight hundred thousand, seven hundred eighty".