16428187 has 8 divisors (see below), whose sum is σ = 17224704. Its totient is φ = 15638568.

The previous prime is 16428173. The next prime is 16428197. The reversal of 16428187 is 78182461.

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

It is a cyclic number.

It is not a de Polignac number, because 16428187 - 2⁷ = 16428059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16428157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3528 + ... + 6730.

It is an arithmetic number, because the mean of its divisors is an integer number (2153088).

Almost surely, 2^16428187 is an apocalyptic number.

16428187 is a deficient number, since it is larger than the sum of its proper divisors (796517).

16428187 is a wasteful number, since it uses less digits than its factorization.

16428187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3449.

The product of its digits is 21504, while the sum is 37.

The square root of 16428187 is about 4053.1699939677. The cubic root of 16428187 is about 254.2122917766.

The spelling of 16428187 in words is "sixteen million, four hundred twenty-eight thousand, one hundred eighty-seven".