421393424 has 20 divisors (see below), whose sum is σ = 818615760. Its totient is φ = 210137760.

The previous prime is 421393417. The next prime is 421393439. The reversal of 421393424 is 424393124.

It is an unprimeable number.

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, 28682 + ... + 40809.

It is an arithmetic number, because the mean of its divisors is an integer number (40930788).

Almost surely, 2^421393424 is an apocalyptic number.

It is an amenable number.

421393424 is a deficient number, since it is larger than the sum of its proper divisors (397222336).

421393424 is a wasteful number, since it uses less digits than its factorization.

421393424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69878 (or 69872 counting only the distinct ones).

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

The square root of 421393424 is about 20527.8694461944. The cubic root of 421393424 is about 749.7145129730.

The spelling of 421393424 in words is "four hundred twenty-one million, three hundred ninety-three thousand, four hundred twenty-four".