421649712 has 120 divisors (see below), whose sum is σ = 1335122880. Its totient is φ = 127759680.

The previous prime is 421649707. The next prime is 421649741. The reversal of 421649712 is 217946124.

It is a happy number.

421649712 is a `hidden beast` number, since 4 + 2 + 1 + 649 + 7 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 23 ways as a sum of consecutive naturals, for example, 37839 + ... + 47697.

It is an arithmetic number, because the mean of its divisors is an integer number (11126024).

Almost surely, 2^421649712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421649712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (667561440).

421649712 is an abundant number, since it is smaller than the sum of its proper divisors (913473168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421649712 is a wasteful number, since it uses less digits than its factorization.

421649712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9893 (or 9875 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 421649712 is about 20534.1109376569. The cubic root of 421649712 is about 749.8664722285.

The spelling of 421649712 in words is "four hundred twenty-one million, six hundred forty-nine thousand, seven hundred twelve".