16428071 has 4 divisors (see below), whose sum is σ = 17921544. Its totient is φ = 14934600.

The previous prime is 16428067. The next prime is 16428073. The reversal of 16428071 is 17082461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16428071 - 2² = 16428067 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16428073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 746720 + ... + 746741.

It is an arithmetic number, because the mean of its divisors is an integer number (4480386).

Almost surely, 2^16428071 is an apocalyptic number.

16428071 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16428071 is a deficient number, since it is larger than the sum of its proper divisors (1493473).

16428071 is a wasteful number, since it uses less digits than its factorization.

16428071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493472.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 16428071 is about 4053.1556841552. The cubic root of 16428071 is about 254.2116934412.

The spelling of 16428071 in words is "sixteen million, four hundred twenty-eight thousand, seventy-one".