1538346687 has 8 divisors (see below), whose sum is σ = 2051310336. Its totient is φ = 1025473752.

The previous prime is 1538346679. The next prime is 1538346713. The reversal of 1538346687 is 7866438351.

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

It is not a de Polignac number, because 1538346687 - 2³ = 1538346679 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538346637) 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, 52458 + ... + 76344.

It is an arithmetic number, because the mean of its divisors is an integer number (256413792).

Almost surely, 2^1538346687 is an apocalyptic number.

1538346687 is a deficient number, since it is larger than the sum of its proper divisors (512963649).

1538346687 is a wasteful number, since it uses less digits than its factorization.

1538346687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45357.

The product of its digits is 2903040, while the sum is 51.

The square root of 1538346687 is about 39221.7629257024. The cubic root of 1538346687 is about 1154.3869455119.

The spelling of 1538346687 in words is "one billion, five hundred thirty-eight million, three hundred forty-six thousand, six hundred eighty-seven".