16109780 has 24 divisors (see below), whose sum is σ = 33911808. Its totient is φ = 6428448.

The previous prime is 16109771. The next prime is 16109791. The reversal of 16109780 is 8790161.

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 7 ways as a sum of consecutive naturals, for example, 11477 + ... + 12803.

It is an arithmetic number, because the mean of its divisors is an integer number (1412992).

Almost surely, 2^16109780 is an apocalyptic number.

16109780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16109780 is an abundant number, since it is smaller than the sum of its proper divisors (17802028).

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

16109780 is a wasteful number, since it uses less digits than its factorization.

16109780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943 (or 1941 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 16109780 is about 4013.6990420309. The cubic root of 16109780 is about 252.5592058008.

The spelling of 16109780 in words is "sixteen million, one hundred nine thousand, seven hundred eighty".