421916384 has 12 divisors (see below), whose sum is σ = 830647944. Its totient is φ = 210958176.

The previous prime is 421916381. The next prime is 421916423. The reversal of 421916384 is 483619124.

It is a super-3 number, since 3×421916384³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421916381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6592412 + ... + 6592475.

It is an arithmetic number, because the mean of its divisors is an integer number (69220662).

Almost surely, 2^421916384 is an apocalyptic number.

It is an amenable number.

421916384 is a deficient number, since it is larger than the sum of its proper divisors (408731560).

421916384 is a wasteful number, since it uses less digits than its factorization.

421916384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13184897 (or 13184889 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The square root of 421916384 is about 20540.6033017533. The cubic root of 421916384 is about 750.0245230500.

The spelling of 421916384 in words is "four hundred twenty-one million, nine hundred sixteen thousand, three hundred eighty-four".