16397730 has 48 divisors (see below), whose sum is σ = 42928704. Its totient is φ = 4342560.

The previous prime is 16397713. The next prime is 16397737. The reversal of 16397730 is 3779361.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16397737) 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 23 ways as a sum of consecutive naturals, for example, 14485 + ... + 15575.

It is an arithmetic number, because the mean of its divisors is an integer number (894348).

Almost surely, 2^16397730 is an apocalyptic number.

16397730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16397730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21464352).

16397730 is an abundant number, since it is smaller than the sum of its proper divisors (26530974).

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

16397730 is a wasteful number, since it uses less digits than its factorization.

16397730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271 (or 1268 counting only the distinct ones).

The product of its (nonzero) digits is 23814, while the sum is 36.

The square root of 16397730 is about 4049.4110682913. The cubic root of 16397730 is about 254.0550958250.

The spelling of 16397730 in words is "sixteen million, three hundred ninety-seven thousand, seven hundred thirty".