38942389 has 8 divisors (see below), whose sum is σ = 41375160. Its totient is φ = 36582336.

The previous prime is 38942383. The next prime is 38942411. The reversal of 38942389 is 98324983.

38942389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3301489 + 35640900 = 1817^2 + 5970^2 .

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 38942389 - 2⁵ = 38942357 is a prime.

It is a super-2 number, since 2×38942389² = 3033019322054642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38942383) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 17074 + ... + 19219.

It is an arithmetic number, because the mean of its divisors is an integer number (5171895).

Almost surely, 2^38942389 is an apocalyptic number.

It is an amenable number.

38942389 is a deficient number, since it is larger than the sum of its proper divisors (2432771).

38942389 is a wasteful number, since it uses less digits than its factorization.

38942389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36359.

The product of its digits is 373248, while the sum is 46.

The square root of 38942389 is about 6240.3837221761. The cubic root of 38942389 is about 338.9540781796.

It can be divided in two parts, 389 and 42389, that added together give a triangular number (42778 = T₂₉₂).

The spelling of 38942389 in words is "thirty-eight million, nine hundred forty-two thousand, three hundred eighty-nine".