3938154389 has 8 divisors (see below), whose sum is σ = 4241616792. Its totient is φ = 3634767360.

The previous prime is 3938154343. The next prime is 3938154439. The reversal of 3938154389 is 9834518393.

It can be written as a sum of positive squares in 4 ways, for example, as 1079648164 + 2858506225 = 32858^2 + 53465^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 3938154389 - 2¹⁶ = 3938088853 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3938154389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3938154289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138209 + ... + 164249.

It is an arithmetic number, because the mean of its divisors is an integer number (530202099).

Almost surely, 2^3938154389 is an apocalyptic number.

It is an amenable number.

3938154389 is a deficient number, since it is larger than the sum of its proper divisors (303462403).

3938154389 is a wasteful number, since it uses less digits than its factorization.

3938154389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37687.

The product of its digits is 2799360, while the sum is 53.

The square root of 3938154389 is about 62754.7160697903. The cubic root of 3938154389 is about 1579.1773730074.

The spelling of 3938154389 in words is "three billion, nine hundred thirty-eight million, one hundred fifty-four thousand, three hundred eighty-nine".