1538425689 has 8 divisors (see below), whose sum is σ = 2055685632. Its totient is φ = 1023391440.

The previous prime is 1538425643. The next prime is 1538425717. The reversal of 1538425689 is 9865248351.

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

It is not a de Polignac number, because 1538425689 - 2²¹ = 1536328537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1538425289) 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, 554809 + ... + 557574.

It is an arithmetic number, because the mean of its divisors is an integer number (256960704).

Almost surely, 2^1538425689 is an apocalyptic number.

It is an amenable number.

1538425689 is a deficient number, since it is larger than the sum of its proper divisors (517259943).

1538425689 is a wasteful number, since it uses less digits than its factorization.

1538425689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112847.

The product of its digits is 2073600, while the sum is 51.

The square root of 1538425689 is about 39222.7700322147. The cubic root of 1538425689 is about 1154.4067064056.

The spelling of 1538425689 in words is "one billion, five hundred thirty-eight million, four hundred twenty-five thousand, six hundred eighty-nine".