16690780 has 24 divisors (see below), whose sum is σ = 35148960. Its totient is φ = 6657600.

The previous prime is 16690771. The next prime is 16690783. The reversal of 16690780 is 8709661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16690783) 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, 7830 + ... + 9730.

It is an arithmetic number, because the mean of its divisors is an integer number (1464540).

Almost surely, 2^16690780 is an apocalyptic number.

16690780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16690780 is an abundant number, since it is smaller than the sum of its proper divisors (18458180).

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

16690780 is a wasteful number, since it uses less digits than its factorization.

16690780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349 (or 2347 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 16690780 is about 4085.4351053468. The cubic root of 16690780 is about 255.5596066010.

The spelling of 16690780 in words is "sixteen million, six hundred ninety thousand, seven hundred eighty".