235643420 has 48 divisors (see below), whose sum is σ = 503774208. Its totient is φ = 92574720.

The previous prime is 235643413. The next prime is 235643423. The reversal of 235643420 is 24346532.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (235643423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 286610 + ... + 287430.

It is an arithmetic number, because the mean of its divisors is an integer number (10495296).

Almost surely, 2^235643420 is an apocalyptic number.

235643420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

235643420 is an abundant number, since it is smaller than the sum of its proper divisors (268130788).

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

235643420 is a wasteful number, since it uses less digits than its factorization.

235643420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070 (or 1068 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 29.

The square root of 235643420 is about 15350.6814181000. The cubic root of 235643420 is about 617.6632644292.

Adding to 235643420 its reverse (24346532), we get a palindrome (259989952).

The spelling of 235643420 in words is "two hundred thirty-five million, six hundred forty-three thousand, four hundred twenty".