38389709 has 4 divisors (see below), whose sum is σ = 40410240. Its totient is φ = 36369180.

The previous prime is 38389693. The next prime is 38389717. The reversal of 38389709 is 90798383.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38389709 - 2⁴ = 38389693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38389759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1010237 + ... + 1010274.

It is an arithmetic number, because the mean of its divisors is an integer number (10102560).

Almost surely, 2^38389709 is an apocalyptic number.

It is an amenable number.

38389709 is a deficient number, since it is larger than the sum of its proper divisors (2020531).

38389709 is a wasteful number, since it uses less digits than its factorization.

38389709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020530.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 38389709 is about 6195.9429467999. The cubic root of 38389709 is about 337.3429253532.

The spelling of 38389709 in words is "thirty-eight million, three hundred eighty-nine thousand, seven hundred nine".