238179840 has 80 divisors (see below), whose sum is σ = 761455728. Its totient is φ = 63512576.

The previous prime is 238179829. The next prime is 238179847. The reversal of 238179840 is 48971832.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 238179792 and 238179801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238179847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7827 + ... + 23186.

Almost surely, 2^238179840 is an apocalyptic number.

238179840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

238179840 is an abundant number, since it is smaller than the sum of its proper divisors (523275888).

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

238179840 is an equidigital number, since it uses as much as digits as its factorization.

238179840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31039 (or 31023 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 238179840 is about 15433.0761677638. The cubic root of 238179840 is about 619.8714960869.

The spelling of 238179840 in words is "two hundred thirty-eight million, one hundred seventy-nine thousand, eight hundred forty".