16648431 has 8 divisors (see below), whose sum is σ = 22220160. Its totient is φ = 11087832.

The previous prime is 16648421. The next prime is 16648441. The reversal of 16648431 is 13484661.

It is an interprime number because it is at equal distance from previous prime (16648421) and next prime (16648441).

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

It is not a de Polignac number, because 16648431 - 2⁶ = 16648367 is a prime.

It is a super-2 number, since 2×16648431² = 554340509523522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16648392 and 16648401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16648421) 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, 1780 + ... + 6038.

It is an arithmetic number, because the mean of its divisors is an integer number (2777520).

Almost surely, 2^16648431 is an apocalyptic number.

16648431 is a deficient number, since it is larger than the sum of its proper divisors (5571729).

16648431 is a wasteful number, since it uses less digits than its factorization.

16648431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5565.

The product of its digits is 13824, while the sum is 33.

The square root of 16648431 is about 4080.2488894674. The cubic root of 16648431 is about 255.3432823776.

The spelling of 16648431 in words is "sixteen million, six hundred forty-eight thousand, four hundred thirty-one".