16681392 has 240 divisors, whose sum is σ = 61384960. Its totient is φ = 4105728.

The previous prime is 16681363. The next prime is 16681397. The reversal of 16681392 is 29318661.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16681397) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 248943 + ... + 249009.

Almost surely, 2^16681392 is an apocalyptic number.

16681392 is a gapful number since it is divisible by the number (12) 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 16681392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30692480).

16681392 is an abundant number, since it is smaller than the sum of its proper divisors (44703568).

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

16681392 is a wasteful number, since it uses less digits than its factorization.

16681392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120 (or 111 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 16681392 is about 4084.2859841103. The cubic root of 16681392 is about 255.5116830658.

The spelling of 16681392 in words is "sixteen million, six hundred eighty-one thousand, three hundred ninety-two".