421856466 has 16 divisors (see below), whose sum is σ = 844497984. Its totient is φ = 140487984.

The previous prime is 421856447. The next prime is 421856467. The reversal of 421856466 is 664658124.

It is not an unprimeable number, because it can be changed into a prime (421856467) 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 7 ways as a sum of consecutive naturals, for example, 25606 + ... + 38721.

It is an arithmetic number, because the mean of its divisors is an integer number (52781124).

Almost surely, 2^421856466 is an apocalyptic number.

421856466 is an abundant number, since it is smaller than the sum of its proper divisors (422641518).

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

421856466 is a wasteful number, since it uses less digits than its factorization.

421856466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65425.

The product of its digits is 276480, while the sum is 42.

The square root of 421856466 is about 20539.1447241603. The cubic root of 421856466 is about 749.9890167280.

The spelling of 421856466 in words is "four hundred twenty-one million, eight hundred fifty-six thousand, four hundred sixty-six".