239742138 has 8 divisors (see below), whose sum is σ = 479484288. Its totient is φ = 79914044.

The previous prime is 239742119. The next prime is 239742199. The reversal of 239742138 is 831247932.

239742138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

239742138 is an admirable number.

It is a super-2 number, since 2×239742138² = 114952585465622088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 239742096 and 239742105.

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, 19978506 + ... + 19978517.

It is an arithmetic number, because the mean of its divisors is an integer number (59935536).

Almost surely, 2^239742138 is an apocalyptic number.

239742138 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.

239742138 is a wasteful number, since it uses less digits than its factorization.

239742138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39957028.

The product of its digits is 72576, while the sum is 39.

The square root of 239742138 is about 15483.6086878996. The cubic root of 239742138 is about 621.2238555474.

The spelling of 239742138 in words is "two hundred thirty-nine million, seven hundred forty-two thousand, one hundred thirty-eight".