421837340 has 12 divisors (see below), whose sum is σ = 885858456. Its totient is φ = 168734928.

The previous prime is 421837331. The next prime is 421837343. The reversal of 421837340 is 43738124.

It is a junction number, because it is equal to n+sod(n) for n = 421837297 and 421837306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421837343) 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, 10545914 + ... + 10545953.

It is an arithmetic number, because the mean of its divisors is an integer number (73821538).

Almost surely, 2^421837340 is an apocalyptic number.

It is an amenable number.

421837340 is an abundant number, since it is smaller than the sum of its proper divisors (464021116).

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

421837340 is a wasteful number, since it uses less digits than its factorization.

421837340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21091876 (or 21091874 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 421837340 is about 20538.6791201382. The cubic root of 421837340 is about 749.9776822989.

The spelling of 421837340 in words is "four hundred twenty-one million, eight hundred thirty-seven thousand, three hundred forty".