38821978582 has 4 divisors (see below), whose sum is σ = 58232967876. Its totient is φ = 19410989290.

The previous prime is 38821978579. The next prime is 38821978597. The reversal of 38821978582 is 28587912883.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 38821978582.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 9705494644 + ... + 9705494647.

It is an arithmetic number, because the mean of its divisors is an integer number (14558241969).

Almost surely, 2^38821978582 is an apocalyptic number.

38821978582 is a deficient number, since it is larger than the sum of its proper divisors (19410989294).

38821978582 is a wasteful number, since it uses less digits than its factorization.

38821978582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19410989293.

The product of its digits is 15482880, while the sum is 61.

It can be divided in two parts, 3882 and 1978582, that added together give a square (1982464 = 1408²).

The spelling of 38821978582 in words is "thirty-eight billion, eight hundred twenty-one million, nine hundred seventy-eight thousand, five hundred eighty-two".