16791644 has 12 divisors (see below), whose sum is σ = 29516424. Its totient is φ = 8358384.

The previous prime is 16791637. The next prime is 16791659. The reversal of 16791644 is 44619761.

It is a happy number.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 16791598 and 16791607.

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, 8339 + ... + 10154.

It is an arithmetic number, because the mean of its divisors is an integer number (2459702).

Almost surely, 2^16791644 is an apocalyptic number.

It is an amenable number.

16791644 is a deficient number, since it is larger than the sum of its proper divisors (12724780).

16791644 is a wasteful number, since it uses less digits than its factorization.

16791644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18724 (or 18722 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 16791644 is about 4097.7608519776. The cubic root of 16791644 is about 256.0733635766.

The spelling of 16791644 in words is "sixteen million, seven hundred ninety-one thousand, six hundred forty-four".