16020780 has 48 divisors (see below), whose sum is σ = 45208800. Its totient is φ = 4238848.

The previous prime is 16020779. The next prime is 16020803. The reversal of 16020780 is 8702061.

It is a self number, because there is not a number n which added to its sum of digits gives 16020780.

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 15 ways as a sum of consecutive naturals, for example, 7246 + ... + 9194.

It is an arithmetic number, because the mean of its divisors is an integer number (941850).

Almost surely, 2^16020780 is an apocalyptic number.

16020780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16020780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22604400).

16020780 is an abundant number, since it is smaller than the sum of its proper divisors (29188020).

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

16020780 is a wasteful number, since it uses less digits than its factorization.

16020780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2098 (or 2096 counting only the distinct ones).

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

The square root of 16020780 is about 4002.5966571714. The cubic root of 16020780 is about 252.0932509512.

The spelling of 16020780 in words is "sixteen million, twenty thousand, seven hundred eighty".