38397239931 has 8 divisors (see below), whose sum is σ = 51270412864. Its totient is φ = 25561113480.

The previous prime is 38397239891. The next prime is 38397239939. The reversal of 38397239931 is 13993279383.

It is a happy number.

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

It is not a de Polignac number, because 38397239931 - 2²⁵ = 38363685499 is a prime.

It is a super-2 number, since 2×38397239931² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38397239939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9259201 + ... + 9263346.

It is an arithmetic number, because the mean of its divisors is an integer number (6408801608).

Almost surely, 2^38397239931 is an apocalyptic number.

38397239931 is a deficient number, since it is larger than the sum of its proper divisors (12873172933).

38397239931 is a wasteful number, since it uses less digits than its factorization.

38397239931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18523241.

The product of its digits is 6613488, while the sum is 57.

The spelling of 38397239931 in words is "thirty-eight billion, three hundred ninety-seven million, two hundred thirty-nine thousand, nine hundred thirty-one".