16891928 has 8 divisors (see below), whose sum is σ = 31672380. Its totient is φ = 8445960.

The previous prime is 16891921. The next prime is 16891951. The reversal of 16891928 is 82919861.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16891921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055738 + ... + 1055753.

Almost surely, 2^16891928 is an apocalyptic number.

It is an amenable number.

16891928 is a deficient number, since it is larger than the sum of its proper divisors (14780452).

16891928 is a wasteful number, since it uses less digits than its factorization.

16891928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111497 (or 2111493 counting only the distinct ones).

The product of its digits is 62208, while the sum is 44.

The square root of 16891928 is about 4109.9790753725. The cubic root of 16891928 is about 256.5821306655.

The spelling of 16891928 in words is "sixteen million, eight hundred ninety-one thousand, nine hundred twenty-eight".