16639441 has 8 divisors (see below), whose sum is σ = 20479424. Its totient is φ = 13165200.

The previous prime is 16639429. The next prime is 16639451. The reversal of 16639441 is 14493661.

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

It is a cyclic number.

It is not a de Polignac number, because 16639441 - 2¹³ = 16631249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16639397 and 16639406.

It is not an unprimeable number, because it can be changed into a prime (16639411) 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, 91335 + ... + 91516.

It is an arithmetic number, because the mean of its divisors is an integer number (2559928).

Almost surely, 2^16639441 is an apocalyptic number.

It is an amenable number.

16639441 is a deficient number, since it is larger than the sum of its proper divisors (3839983).

16639441 is a wasteful number, since it uses less digits than its factorization.

16639441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182871.

The product of its digits is 15552, while the sum is 34.

The square root of 16639441 is about 4079.1470922241. The cubic root of 16639441 is about 255.2973130923.

The spelling of 16639441 in words is "sixteen million, six hundred thirty-nine thousand, four hundred forty-one".