238402739 has 8 divisors (see below), whose sum is σ = 240000000. Its totient is φ = 236810952.

The previous prime is 238402721. The next prime is 238402757. The reversal of 238402739 is 937204832.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (238402721) and next prime (238402757).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238402739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238402789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118262 + ... + 120260.

It is an arithmetic number, because the mean of its divisors is an integer number (30000000).

Almost surely, 2^238402739 is an apocalyptic number.

238402739 is a deficient number, since it is larger than the sum of its proper divisors (1597261).

238402739 is a wasteful number, since it uses less digits than its factorization.

238402739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 238402739 is about 15440.2959492362. The cubic root of 238402739 is about 620.0648033201.

The spelling of 238402739 in words is "two hundred thirty-eight million, four hundred two thousand, seven hundred thirty-nine".