16749638 has 16 divisors (see below), whose sum is σ = 25549776. Its totient is φ = 8234400.

The previous prime is 16749637. The next prime is 16749647. The reversal of 16749638 is 83694761.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16749637) 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, 57020 + ... + 57312.

It is an arithmetic number, because the mean of its divisors is an integer number (1596861).

Almost surely, 2^16749638 is an apocalyptic number.

16749638 is a deficient number, since it is larger than the sum of its proper divisors (8800138).

16749638 is a wasteful number, since it uses less digits than its factorization.

16749638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679.

The product of its digits is 217728, while the sum is 44.

The square root of 16749638 is about 4092.6321603584. The cubic root of 16749638 is about 255.8596541112.

The spelling of 16749638 in words is "sixteen million, seven hundred forty-nine thousand, six hundred thirty-eight".