421634620 has 96 divisors (see below), whose sum is σ = 1018967040. Its totient is φ = 145052160.

The previous prime is 421634593. The next prime is 421634621. The reversal of 421634620 is 26436124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421634621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 520776 + ... + 521584.

It is an arithmetic number, because the mean of its divisors is an integer number (10614240).

Almost surely, 2^421634620 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 421634620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (509483520).

421634620 is an abundant number, since it is smaller than the sum of its proper divisors (597332420).

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

421634620 is a wasteful number, since it uses less digits than its factorization.

421634620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955 (or 953 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 421634620 is about 20533.7434482853. The cubic root of 421634620 is about 749.8575255290.

The spelling of 421634620 in words is "four hundred twenty-one million, six hundred thirty-four thousand, six hundred twenty".