421717648 has 20 divisors (see below), whose sum is σ = 891358128. Its totient is φ = 191689760.

The previous prime is 421717643. The next prime is 421717679. The reversal of 421717648 is 846717124.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 421717648.

It is not an unprimeable number, because it can be changed into a prime (421717643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1197886 + ... + 1198237.

Almost surely, 2^421717648 is an apocalyptic number.

It is an amenable number.

421717648 is an abundant number, since it is smaller than the sum of its proper divisors (469640480).

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

421717648 is a wasteful number, since it uses less digits than its factorization.

421717648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396142 (or 2396136 counting only the distinct ones).

The product of its digits is 75264, while the sum is 40.

The square root of 421717648 is about 20535.7650940986. The cubic root of 421717648 is about 749.9067427750.

The spelling of 421717648 in words is "four hundred twenty-one million, seven hundred seventeen thousand, six hundred forty-eight".