16642738 has 16 divisors (see below), whose sum is σ = 28600704. Its totient is φ = 7115040.

The previous prime is 16642709. The next prime is 16642739. The reversal of 16642738 is 83724661.

It is a junction number, because it is equal to n+sod(n) for n = 16642697 and 16642706.

It is not an unprimeable number, because it can be changed into a prime (16642739) 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, 5598 + ... + 8038.

It is an arithmetic number, because the mean of its divisors is an integer number (1787544).

Almost surely, 2^16642738 is an apocalyptic number.

16642738 is a deficient number, since it is larger than the sum of its proper divisors (11957966).

16642738 is a wasteful number, since it uses less digits than its factorization.

16642738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2937.

The product of its digits is 48384, while the sum is 37.

The square root of 16642738 is about 4079.5512008063. The cubic root of 16642738 is about 255.3141738281.

The spelling of 16642738 in words is "sixteen million, six hundred forty-two thousand, seven hundred thirty-eight".