16428657 has 16 divisors (see below), whose sum is σ = 25103232. Its totient is φ = 9361920.

The previous prime is 16428653. The next prime is 16428661. The reversal of 16428657 is 75682461.

It is an interprime number because it is at equal distance from previous prime (16428653) and next prime (16428661).

It is not a de Polignac number, because 16428657 - 2² = 16428653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16428653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8833 + ... + 10529.

It is an arithmetic number, because the mean of its divisors is an integer number (1568952).

Almost surely, 2^16428657 is an apocalyptic number.

It is an amenable number.

16428657 is a deficient number, since it is larger than the sum of its proper divisors (8674575).

16428657 is a wasteful number, since it uses less digits than its factorization.

16428657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2168.

The product of its digits is 80640, while the sum is 39.

The square root of 16428657 is about 4053.2279728631. The cubic root of 16428657 is about 254.2147160375.

The spelling of 16428657 in words is "sixteen million, four hundred twenty-eight thousand, six hundred fifty-seven".