421993072 has 20 divisors (see below), whose sum is σ = 835009056. Its totient is φ = 206506880.

The previous prime is 421993063. The next prime is 421993073. The reversal of 421993072 is 270399124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421993073) 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, 279829 + ... + 281332.

Almost surely, 2^421993072 is an apocalyptic number.

It is an amenable number.

421993072 is a deficient number, since it is larger than the sum of its proper divisors (413015984).

421993072 is a wasteful number, since it uses less digits than its factorization.

421993072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561216 (or 561210 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 421993072 is about 20542.4699586004. The cubic root of 421993072 is about 750.0699620661.

The spelling of 421993072 in words is "four hundred twenty-one million, nine hundred ninety-three thousand, seventy-two".