1385313881 has 8 divisors (see below), whose sum is σ = 1585364160. Its totient is φ = 1185800688.

The previous prime is 1385313877. The next prime is 1385313887. The reversal of 1385313881 is 1883135831.

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

It is a cyclic number.

It is not a de Polignac number, because 1385313881 - 2² = 1385313877 is a prime.

It is a super-2 number, since 2×1385313881² = 3838189097782564322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1385313887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128726 + ... + 139071.

It is an arithmetic number, because the mean of its divisors is an integer number (198170520).

Almost surely, 2^1385313881 is an apocalyptic number.

It is an amenable number.

1385313881 is a deficient number, since it is larger than the sum of its proper divisors (200050279).

1385313881 is an equidigital number, since it uses as much as digits as its factorization.

1385313881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268543.

The product of its digits is 69120, while the sum is 41.

The square root of 1385313881 is about 37219.8049565013. The cubic root of 1385313881 is about 1114.7634697050.

The spelling of 1385313881 in words is "one billion, three hundred eighty-five million, three hundred thirteen thousand, eight hundred eighty-one".