38439725686 has 8 divisors (see below), whose sum is σ = 57716736840. Its totient is φ = 19200813408.

The previous prime is 38439725647. The next prime is 38439725693. The reversal of 38439725686 is 68652793483.

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

It is a super-2 number, since 2×38439725686² (a number of 22 digits) contains 22 as substring.

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, 9522196 + ... + 9526231.

It is an arithmetic number, because the mean of its divisors is an integer number (7214592105).

Almost surely, 2^38439725686 is an apocalyptic number.

38439725686 is a deficient number, since it is larger than the sum of its proper divisors (19277011154).

38439725686 is a wasteful number, since it uses less digits than its factorization.

38439725686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19049438.

The product of its digits is 52254720, while the sum is 61.

The spelling of 38439725686 in words is "thirty-eight billion, four hundred thirty-nine million, seven hundred twenty-five thousand, six hundred eighty-six".