38857821429 has 16 divisors (see below), whose sum is σ = 59263309952. Its totient is φ = 22185197568.

The previous prime is 38857821427. The next prime is 38857821439. The reversal of 38857821429 is 92412875883.

It is not a de Polignac number, because 38857821429 - 2¹ = 38857821427 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38857821427) 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 15 ways as a sum of consecutive naturals, for example, 778204 + ... + 826629.

It is an arithmetic number, because the mean of its divisors is an integer number (3703956872).

Almost surely, 2^38857821429 is an apocalyptic number.

It is an amenable number.

38857821429 is a deficient number, since it is larger than the sum of its proper divisors (20405488523).

38857821429 is a wasteful number, since it uses less digits than its factorization.

38857821429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605996.

The product of its digits is 7741440, while the sum is 57.

The spelling of 38857821429 in words is "thirty-eight billion, eight hundred fifty-seven million, eight hundred twenty-one thousand, four hundred twenty-nine".