421944616 has 16 divisors (see below), whose sum is σ = 791465940. Its totient is φ = 210887040.

The previous prime is 421944587. The next prime is 421944619. The reversal of 421944616 is 616449124.

It can be written as a sum of positive squares in 2 ways, for example, as 406183716 + 15760900 = 20154^2 + 3970^2 .

It is not an unprimeable number, because it can be changed into a prime (421944619) 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 3 ways as a sum of consecutive naturals, for example, 13626 + ... + 32086.

Almost surely, 2^421944616 is an apocalyptic number.

It is an amenable number.

421944616 is a deficient number, since it is larger than the sum of its proper divisors (369521324).

421944616 is a wasteful number, since it uses less digits than its factorization.

421944616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21324 (or 21320 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 421944616 is about 20541.2905144735. The cubic root of 421944616 is about 750.0412516570.

The spelling of 421944616 in words is "four hundred twenty-one million, nine hundred forty-four thousand, six hundred sixteen".