238109340 has 144 divisors (see below), whose sum is σ = 800174592. Its totient is φ = 51727104.

The previous prime is 238109303. The next prime is 238109341. The reversal of 238109340 is 43901832.

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 = 238109298 and 238109307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238109341) 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, 1516542 + ... + 1516698.

It is an arithmetic number, because the mean of its divisors is an integer number (5556768).

Almost surely, 2^238109340 is an apocalyptic number.

238109340 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 238109340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (400087296).

238109340 is an abundant number, since it is smaller than the sum of its proper divisors (562065252).

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

238109340 is a wasteful number, since it uses less digits than its factorization.

238109340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 238109340 is about 15430.7919433839. The cubic root of 238109340 is about 619.8103304667.

The spelling of 238109340 in words is "two hundred thirty-eight million, one hundred nine thousand, three hundred forty".