2016780 has 24 divisors (see below), whose sum is σ = 5647152. Its totient is φ = 537792.

The previous prime is 2016739. The next prime is 2016787. The reversal of 2016780 is 876102.

It is a self number, because there is not a number n which added to its sum of digits gives 2016780.

It is not an unprimeable number, because it can be changed into a prime (2016787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16747 + ... + 16866.

It is an arithmetic number, because the mean of its divisors is an integer number (235298).

2^2016780 is an apocalyptic number.

2016780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2016780 is an abundant number, since it is smaller than the sum of its proper divisors (3630372).

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

2016780 is a wasteful number, since it uses less digits than its factorization.

2016780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33625 (or 33623 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 2016780 is about 1420.1337965136. The cubic root of 2016780 is about 126.3434820498.

The spelling of 2016780 in words is "two million, sixteen thousand, seven hundred eighty".