16420456 has 16 divisors (see below), whose sum is σ = 33156900. Its totient is φ = 7578624.

The previous prime is 16420447. The next prime is 16420463. The reversal of 16420456 is 65402461.

It can be written as a sum of positive squares in 2 ways, for example, as 16402500 + 17956 = 4050^2 + 134^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78841 + ... + 79048.

Almost surely, 2^16420456 is an apocalyptic number.

It is an amenable number.

16420456 is an abundant number, since it is smaller than the sum of its proper divisors (16736444).

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

16420456 is a wasteful number, since it uses less digits than its factorization.

16420456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157908 (or 157904 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 16420456 is about 4052.2161837691. The cubic root of 16420456 is about 254.1724086254.

The spelling of 16420456 in words is "sixteen million, four hundred twenty thousand, four hundred fifty-six".