420242238 has 96 divisors (see below), whose sum is σ = 1006387200. Its totient is φ = 125955648.

The previous prime is 420242233. The next prime is 420242243. The reversal of 420242238 is 832242024.

420242238 is a `hidden beast` number, since 4 + 202 + 422 + 38 = 666.

It is an interprime number because it is at equal distance from previous prime (420242233) and next prime (420242243).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420242233) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2347633 + ... + 2347811.

It is an arithmetic number, because the mean of its divisors is an integer number (10483200).

Almost surely, 2^420242238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420242238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (503193600).

420242238 is an abundant number, since it is smaller than the sum of its proper divisors (586144962).

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

420242238 is a wasteful number, since it uses less digits than its factorization.

420242238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 403 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 420242238 is about 20499.8106820527. The cubic root of 420242238 is about 749.0311864058.

The spelling of 420242238 in words is "four hundred twenty million, two hundred forty-two thousand, two hundred thirty-eight".