38731312784 has 20 divisors (see below), whose sum is σ = 75057920316. Its totient is φ = 19361526912.

The previous prime is 38731312777. The next prime is 38731312799. The reversal of 38731312784 is 48721313783.

It can be written as a sum of positive squares in 2 ways, for example, as 13586233600 + 25145079184 = 116560^2 + 158572^2 .

It is a super-2 number, since 2×38731312784² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179999 + ... + 331454.

Almost surely, 2^38731312784 is an apocalyptic number.

It is an amenable number.

38731312784 is a deficient number, since it is larger than the sum of its proper divisors (36326607532).

38731312784 is a wasteful number, since it uses less digits than its factorization.

38731312784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516194 (or 516188 counting only the distinct ones).

The product of its digits is 677376, while the sum is 47.

Subtracting 38731312784 from its reverse (48721313783), we obtain a palindrome (9990000999).

The spelling of 38731312784 in words is "thirty-eight billion, seven hundred thirty-one million, three hundred twelve thousand, seven hundred eighty-four".