38687769 has 12 divisors (see below), whose sum is σ = 57809700. Its totient is φ = 24902304.

The previous prime is 38687749. The next prime is 38687773. The reversal of 38687769 is 96778683.

It can be written as a sum of positive squares in 2 ways, for example, as 33212169 + 5475600 = 5763^2 + 2340^2 .

It is not a de Polignac number, because 38687769 - 2⁸ = 38687513 is a prime.

It is a super-2 number, since 2×38687769² = 2993486940394722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (38687729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73854 + ... + 74375.

It is an arithmetic number, because the mean of its divisors is an integer number (4817475).

Almost surely, 2^38687769 is an apocalyptic number.

It is an amenable number.

38687769 is a deficient number, since it is larger than the sum of its proper divisors (19121931).

38687769 is a wasteful number, since it uses less digits than its factorization.

38687769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148264 (or 148261 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 38687769 is about 6219.9492763205. The cubic root of 38687769 is about 338.2137258033.

The spelling of 38687769 in words is "thirty-eight million, six hundred eighty-seven thousand, seven hundred sixty-nine".