38660509 has 4 divisors (see below), whose sum is σ = 39993660. Its totient is φ = 37327360.

The previous prime is 38660507. The next prime is 38660521. The reversal of 38660509 is 90506683.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90506683 = 271 ⋅333973.

It can be written as a sum of positive squares in 2 ways, for example, as 12425625 + 26234884 = 3525^2 + 5122^2 .

It is a cyclic number.

It is not a de Polignac number, because 38660509 - 2¹ = 38660507 is a prime.

It is a super-2 number, since 2×38660509² = 2989269912278162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38660507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666532 + ... + 666589.

It is an arithmetic number, because the mean of its divisors is an integer number (9998415).

Almost surely, 2^38660509 is an apocalyptic number.

It is an amenable number.

38660509 is a deficient number, since it is larger than the sum of its proper divisors (1333151).

38660509 is a wasteful number, since it uses less digits than its factorization.

38660509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333150.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 38660509 is about 6217.7575539739. The cubic root of 38660509 is about 338.1342702656.

The spelling of 38660509 in words is "thirty-eight million, six hundred sixty thousand, five hundred nine".