16040638 has 8 divisors (see below), whose sum is σ = 24079320. Its totient is φ = 8014200.

The previous prime is 16040611. The next prime is 16040641. The reversal of 16040638 is 83604061.

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

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, 1693 + ... + 5911.

It is an arithmetic number, because the mean of its divisors is an integer number (3009915).

Almost surely, 2^16040638 is an apocalyptic number.

16040638 is a deficient number, since it is larger than the sum of its proper divisors (8038682).

16040638 is a wasteful number, since it uses less digits than its factorization.

16040638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6122.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 16040638 is about 4005.0765286072. The cubic root of 16040638 is about 252.1973657495.

Adding to 16040638 its reverse (83604061), we get a palindrome (99644699).

The spelling of 16040638 in words is "sixteen million, forty thousand, six hundred thirty-eight".