1385855850 has 24 divisors (see below), whose sum is σ = 3436922880. Its totient is φ = 369561520.

The previous prime is 1385855813. The next prime is 1385855851. The reversal of 1385855850 is 585585831.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1385855850.

It is not an unprimeable number, because it can be changed into a prime (1385855851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4619370 + ... + 4619669.

It is an arithmetic number, because the mean of its divisors is an integer number (143205120).

Almost surely, 2^1385855850 is an apocalyptic number.

1385855850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1385855850 is an abundant number, since it is smaller than the sum of its proper divisors (2051067030).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1385855850 is a wasteful number, since it uses less digits than its factorization.

1385855850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9239054 (or 9239049 counting only the distinct ones).

The product of its (nonzero) digits is 960000, while the sum is 48.

The square root of 1385855850 is about 37227.0848979611. The cubic root of 1385855850 is about 1114.9088250837.

The spelling of 1385855850 in words is "one billion, three hundred eighty-five million, eight hundred fifty-five thousand, eight hundred fifty".