238347193638 has 8 divisors (see below), whose sum is σ = 476694387288. Its totient is φ = 79449064544.

The previous prime is 238347193627. The next prime is 238347193673. The reversal of 238347193638 is 836391743832.

It is a sphenic number, since it is the product of 3 distinct primes.

238347193638 is an admirable number.

It is a super-2 number, since 2×238347193638² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19862266131 + ... + 19862266142.

It is an arithmetic number, because the mean of its divisors is an integer number (59586798411).

Almost surely, 2^238347193638 is an apocalyptic number.

238347193638 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.

238347193638 is a wasteful number, since it uses less digits than its factorization.

238347193638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39724532278.

The product of its digits is 15676416, while the sum is 57.

It can be divided in two parts, 238347 and 193638, that added together give a triangular number (431985 = T₉₂₉).

The spelling of 238347193638 in words is "two hundred thirty-eight billion, three hundred forty-seven million, one hundred ninety-three thousand, six hundred thirty-eight".