3860720509 has 4 divisors (see below), whose sum is σ = 3882288960. Its totient is φ = 3839152060.

The previous prime is 3860720449. The next prime is 3860720543. The reversal of 3860720509 is 9050270683.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3860720509 - 2¹¹ = 3860718461 is a prime.

It is a super-2 number, since 2×3860720509² = 29810325697226438162, 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 (3860720909) 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, 10783957 + ... + 10784314.

It is an arithmetic number, because the mean of its divisors is an integer number (970572240).

Almost surely, 2^3860720509 is an apocalyptic number.

It is an amenable number.

3860720509 is a deficient number, since it is larger than the sum of its proper divisors (21568451).

3860720509 is a wasteful number, since it uses less digits than its factorization.

3860720509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21568450.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 3860720509 is about 62134.6964988162. The cubic root of 3860720509 is about 1568.7586044744.

The spelling of 3860720509 in words is "three billion, eight hundred sixty million, seven hundred twenty thousand, five hundred nine".