16420128 has 24 divisors (see below), whose sum is σ = 43103088. Its totient is φ = 5473344.

The previous prime is 16420127. The next prime is 16420133. The reversal of 16420128 is 82102461.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 16420098 and 16420107.

It is not an unprimeable number, because it can be changed into a prime (16420121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85426 + ... + 85617.

It is an arithmetic number, because the mean of its divisors is an integer number (1795962).

Almost surely, 2^16420128 is an apocalyptic number.

It is an amenable number.

16420128 is an abundant number, since it is smaller than the sum of its proper divisors (26682960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16420128 is a wasteful number, since it uses less digits than its factorization.

16420128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171056 (or 171048 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 16420128 is about 4052.1757118861. The cubic root of 16420128 is about 254.1707162423.

Adding to 16420128 its reverse (82102461), we get a palindrome (98522589).

The spelling of 16420128 in words is "sixteen million, four hundred twenty thousand, one hundred twenty-eight".