1386220871 has 16 divisors (see below), whose sum is σ = 1633209600. Its totient is φ = 1152024768.

The previous prime is 1386220853. The next prime is 1386220877. The reversal of 1386220871 is 1780226831.

It is a cyclic number.

It is not a de Polignac number, because 1386220871 - 2⁶ = 1386220807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386220877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7160 + ... + 53138.

It is an arithmetic number, because the mean of its divisors is an integer number (102075600).

Almost surely, 2^1386220871 is an apocalyptic number.

1386220871 is a deficient number, since it is larger than the sum of its proper divisors (246988729).

1386220871 is an equidigital number, since it uses as much as digits as its factorization.

1386220871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46118.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 1386220871 is about 37231.9872018672. The cubic root of 1386220871 is about 1115.0067018841.

The spelling of 1386220871 in words is "one billion, three hundred eighty-six million, two hundred twenty thousand, eight hundred seventy-one".