1385908849 has 8 divisors (see below), whose sum is σ = 1571071040. Its totient is φ = 1211968656.

The previous prime is 1385908841. The next prime is 1385908871. The reversal of 1385908849 is 9488095831.

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

It is not a de Polignac number, because 1385908849 - 2³ = 1385908841 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1385908849.

It is not an unprimeable number, because it can be changed into a prime (1385908841) 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, 2805237 + ... + 2805730.

It is an arithmetic number, because the mean of its divisors is an integer number (196383880).

Almost surely, 2^1385908849 is an apocalyptic number.

1385908849 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1385908849 is a deficient number, since it is larger than the sum of its proper divisors (185162191).

1385908849 is a wasteful number, since it uses less digits than its factorization.

1385908849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5610999.

The product of its (nonzero) digits is 2488320, while the sum is 55.

The square root of 1385908849 is about 37227.7967250279. The cubic root of 1385908849 is about 1114.9230373121.

The spelling of 1385908849 in words is "one billion, three hundred eighty-five million, nine hundred eight thousand, eight hundred forty-nine".