421843340 has 12 divisors (see below), whose sum is σ = 885871056. Its totient is φ = 168737328.

The previous prime is 421843313. The next prime is 421843343. The reversal of 421843340 is 43348124.

It is not an unprimeable number, because it can be changed into a prime (421843343) 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, 10546064 + ... + 10546103.

It is an arithmetic number, because the mean of its divisors is an integer number (73822588).

Almost surely, 2^421843340 is an apocalyptic number.

It is an amenable number.

421843340 is an abundant number, since it is smaller than the sum of its proper divisors (464027716).

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

421843340 is a wasteful number, since it uses less digits than its factorization.

421843340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21092176 (or 21092174 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 421843340 is about 20538.8251854871. The cubic root of 421843340 is about 749.9812380492.

The spelling of 421843340 in words is "four hundred twenty-one million, eight hundred forty-three thousand, three hundred forty".