1538739769 has 8 divisors (see below), whose sum is σ = 1764776000. Its totient is φ = 1314257616.

The previous prime is 1538739733. The next prime is 1538739773. The reversal of 1538739769 is 9679378351.

It is a happy number.

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

It is not a de Polignac number, because 1538739769 - 2¹⁷ = 1538608697 is a prime.

It is a super-2 number, since 2×1538739769² = 4735440153404346722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1538739269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386394 + ... + 390355.

It is an arithmetic number, because the mean of its divisors is an integer number (220597000).

Almost surely, 2^1538739769 is an apocalyptic number.

It is an amenable number.

1538739769 is a deficient number, since it is larger than the sum of its proper divisors (226036231).

1538739769 is an equidigital number, since it uses as much as digits as its factorization.

1538739769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777039.

The product of its digits is 8573040, while the sum is 58.

The square root of 1538739769 is about 39226.7736246559. The cubic root of 1538739769 is about 1154.4852610366.

The spelling of 1538739769 in words is "one billion, five hundred thirty-eight million, seven hundred thirty-nine thousand, seven hundred sixty-nine".