238443940 has 48 divisors (see below), whose sum is σ = 590736384. Its totient is φ = 79113600.

The previous prime is 238443929. The next prime is 238443941. The reversal of 238443940 is 49344832.

It is a self number, because there is not a number n which added to its sum of digits gives 238443940.

It is not an unprimeable number, because it can be changed into a prime (238443941) 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, 23131 + ... + 31810.

It is an arithmetic number, because the mean of its divisors is an integer number (12307008).

Almost surely, 2^238443940 is an apocalyptic number.

238443940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

238443940 is an abundant number, since it is smaller than the sum of its proper divisors (352292444).

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

238443940 is a wasteful number, since it uses less digits than its factorization.

238443940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54988 (or 54986 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 37.

The square root of 238443940 is about 15441.6300952976. The cubic root of 238443940 is about 620.1005213359.

The spelling of 238443940 in words is "two hundred thirty-eight million, four hundred forty-three thousand, nine hundred forty".