238647668 has 12 divisors (see below), whose sum is σ = 477295392. Its totient is φ = 102277560.

The previous prime is 238647667. The next prime is 238647691. The reversal of 238647668 is 866746832.

238647668 is an admirable number.

It is a super-4 number, since 4×238647668⁴ (a number of 35 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238647667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4261538 + ... + 4261593.

It is an arithmetic number, because the mean of its divisors is an integer number (39774616).

Almost surely, 2^238647668 is an apocalyptic number.

238647668 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

238647668 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

238647668 is a wasteful number, since it uses less digits than its factorization.

238647668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8523142 (or 8523140 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 50.

The square root of 238647668 is about 15448.2253997021. The cubic root of 238647668 is about 620.2770769888.

The spelling of 238647668 in words is "two hundred thirty-eight million, six hundred forty-seven thousand, six hundred sixty-eight".