238831140 has 96 divisors (see below), whose sum is σ = 707051520. Its totient is φ = 60068736.

The previous prime is 238831139. The next prime is 238831157. The reversal of 238831140 is 41138832.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 238831098 and 238831107.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 436347 + ... + 436893.

It is an arithmetic number, because the mean of its divisors is an integer number (7365120).

Almost surely, 2^238831140 is an apocalyptic number.

238831140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 238831140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353525760).

238831140 is an abundant number, since it is smaller than the sum of its proper divisors (468220380).

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

238831140 is a wasteful number, since it uses less digits than its factorization.

238831140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961 (or 959 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 238831140 is about 15454.1625460586. The cubic root of 238831140 is about 620.4359923266.

Adding to 238831140 its reverse (41138832), we get a palindrome (279969972).

The spelling of 238831140 in words is "two hundred thirty-eight million, eight hundred thirty-one thousand, one hundred forty".