16428005 has 8 divisors (see below), whose sum is σ = 21505824. Its totient is φ = 11947600.

The previous prime is 16427987. The next prime is 16428011. The reversal of 16428005 is 50082461.

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

It is not a de Polignac number, because 16428005 - 2¹⁴ = 16411621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149291 + ... + 149400.

It is an arithmetic number, because the mean of its divisors is an integer number (2688228).

Almost surely, 2^16428005 is an apocalyptic number.

It is an amenable number.

16428005 is a deficient number, since it is larger than the sum of its proper divisors (5077819).

16428005 is a wasteful number, since it uses less digits than its factorization.

16428005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298707.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 16428005 is about 4053.1475423429. The cubic root of 16428005 is about 254.2113530078.

The spelling of 16428005 in words is "sixteen million, four hundred twenty-eight thousand, five".