39138789 has 8 divisors (see below), whose sum is σ = 52214112. Its totient is φ = 26078000.

The previous prime is 39138769. The next prime is 39138797. The reversal of 39138789 is 98783193.

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 39138789 - 2²¹ = 37041637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39138769) 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, 7747 + ... + 11759.

It is an arithmetic number, because the mean of its divisors is an integer number (6526764).

Almost surely, 2^39138789 is an apocalyptic number.

It is an amenable number.

39138789 is a deficient number, since it is larger than the sum of its proper divisors (13075323).

39138789 is a wasteful number, since it uses less digits than its factorization.

39138789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7267.

The product of its digits is 326592, while the sum is 48.

The square root of 39138789 is about 6256.1001430604. The cubic root of 39138789 is about 339.5229439864.

The spelling of 39138789 in words is "thirty-nine million, one hundred thirty-eight thousand, seven hundred eighty-nine".