16396538 has 4 divisors (see below), whose sum is σ = 24594810. Its totient is φ = 8198268.

The previous prime is 16396537. The next prime is 16396547. The reversal of 16396538 is 83569361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 8684809 + 7711729 = 2947^2 + 2777^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16396495 and 16396504.

It is not an unprimeable number, because it can be changed into a prime (16396537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4099133 + ... + 4099136.

Almost surely, 2^16396538 is an apocalyptic number.

16396538 is a deficient number, since it is larger than the sum of its proper divisors (8198272).

16396538 is an equidigital number, since it uses as much as digits as its factorization.

16396538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8198271.

The product of its digits is 116640, while the sum is 41.

The square root of 16396538 is about 4049.2638837201. The cubic root of 16396538 is about 254.0489396678.

The spelling of 16396538 in words is "sixteen million, three hundred ninety-six thousand, five hundred thirty-eight".