420005446 has 32 divisors (see below), whose sum is σ = 733420800. Its totient is φ = 176669856.

The previous prime is 420005437. The next prime is 420005447. The reversal of 420005446 is 644500024.

It is a self number, because there is not a number n which added to its sum of digits gives 420005446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420005447) 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 15 ways as a sum of consecutive naturals, for example, 326721 + ... + 328003.

It is an arithmetic number, because the mean of its divisors is an integer number (22919400).

Almost surely, 2^420005446 is an apocalyptic number.

420005446 is a deficient number, since it is larger than the sum of its proper divisors (313415354).

420005446 is a wasteful number, since it uses less digits than its factorization.

420005446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1708.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 420005446 is about 20494.0344002834. The cubic root of 420005446 is about 748.8904755649.

The spelling of 420005446 in words is "four hundred twenty million, five thousand, four hundred forty-six".