16720238 has 8 divisors (see below), whose sum is σ = 25122000. Its totient is φ = 8346240.

The previous prime is 16720217. The next prime is 16720243. The reversal of 16720238 is 83202761.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 16720238.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5363 + ... + 7886.

It is an arithmetic number, because the mean of its divisors is an integer number (3140250).

Almost surely, 2^16720238 is an apocalyptic number.

16720238 is a deficient number, since it is larger than the sum of its proper divisors (8401762).

16720238 is a wasteful number, since it uses less digits than its factorization.

16720238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13882.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 16720238 is about 4089.0387623499. The cubic root of 16720238 is about 255.7098662110.

Adding to 16720238 its reverse (83202761), we get a palindrome (99922999).

The spelling of 16720238 in words is "sixteen million, seven hundred twenty thousand, two hundred thirty-eight".