420656238 has 48 divisors (see below), whose sum is σ = 964513680. Its totient is φ = 132129792.

The previous prime is 420656237. The next prime is 420656261. The reversal of 420656238 is 832656024.

420656238 is a `hidden beast` number, since 4 + 20 + 6 + 5 + 623 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420656237) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62820 + ... + 69192.

It is an arithmetic number, because the mean of its divisors is an integer number (20094035).

Almost surely, 2^420656238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420656238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (482256840).

420656238 is an abundant number, since it is smaller than the sum of its proper divisors (543857442).

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

420656238 is a wasteful number, since it uses less digits than its factorization.

420656238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6593 (or 6590 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 420656238 is about 20509.9058505884. The cubic root of 420656238 is about 749.2770740613.

The spelling of 420656238 in words is "four hundred twenty million, six hundred fifty-six thousand, two hundred thirty-eight".