420446390 has 128 divisors (see below), whose sum is σ = 975421440. Its totient is φ = 126950400.

The previous prime is 420446359. The next prime is 420446393. The reversal of 420446390 is 93644024.

420446390 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420446393) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 2201195 + ... + 2201385.

It is an arithmetic number, because the mean of its divisors is an integer number (7620480).

Almost surely, 2^420446390 is an apocalyptic number.

420446390 is an abundant number, since it is smaller than the sum of its proper divisors (554975050).

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

420446390 is a wasteful number, since it uses less digits than its factorization.

420446390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 420446390 is about 20504.7894405185. The cubic root of 420446390 is about 749.1524588892.

The spelling of 420446390 in words is "four hundred twenty million, four hundred forty-six thousand, three hundred ninety".