421789516 has 24 divisors (see below), whose sum is σ = 782366256. Its totient is φ = 198282240.

The previous prime is 421789471. The next prime is 421789517. The reversal of 421789516 is 615987124.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (421789517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76980 + ... + 82276.

It is an arithmetic number, because the mean of its divisors is an integer number (32598594).

Almost surely, 2^421789516 is an apocalyptic number.

It is an amenable number.

421789516 is a deficient number, since it is larger than the sum of its proper divisors (360576740).

421789516 is a wasteful number, since it uses less digits than its factorization.

421789516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6489 (or 6487 counting only the distinct ones).

The product of its digits is 120960, while the sum is 43.

The square root of 421789516 is about 20537.5148447907. The cubic root of 421789516 is about 749.9493393929.

The spelling of 421789516 in words is "four hundred twenty-one million, seven hundred eighty-nine thousand, five hundred sixteen".