16368639 has 16 divisors (see below), whose sum is σ = 25175040. Its totient is φ = 9266400.

The previous prime is 16368619. The next prime is 16368659. The reversal of 16368639 is 93686361.

It is an interprime number because it is at equal distance from previous prime (16368619) and next prime (16368659).

It is not a de Polignac number, because 16368639 - 2¹¹ = 16366591 is a prime.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 16368639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16368619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1287 + ... + 5864.

It is an arithmetic number, because the mean of its divisors is an integer number (1573440).

Almost surely, 2^16368639 is an apocalyptic number.

16368639 is a deficient number, since it is larger than the sum of its proper divisors (8806401).

16368639 is a wasteful number, since it uses less digits than its factorization.

16368639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7270.

The product of its digits is 139968, while the sum is 42.

The square root of 16368639 is about 4045.8174699311. The cubic root of 16368639 is about 253.9047682757.

The spelling of 16368639 in words is "sixteen million, three hundred sixty-eight thousand, six hundred thirty-nine".