420710238 has 96 divisors (see below), whose sum is σ = 1031546880. Its totient is φ = 123024960.

The previous prime is 420710201. The next prime is 420710249. The reversal of 420710238 is 832017024.

420710238 is a `hidden beast` number, since 420 + 7 + 1 + 0 + 238 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 427495 + ... + 428477.

It is an arithmetic number, because the mean of its divisors is an integer number (10745280).

Almost surely, 2^420710238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420710238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (515773440).

420710238 is an abundant number, since it is smaller than the sum of its proper divisors (610836642).

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

420710238 is a wasteful number, since it uses less digits than its factorization.

420710238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094 (or 1091 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 420710238 is about 20511.2222453953. Note that the first 4 decimals coincide. The cubic root of 420710238 is about 749.3091344685.

The spelling of 420710238 in words is "four hundred twenty million, seven hundred ten thousand, two hundred thirty-eight".