1385866416 has 80 divisors (see below), whose sum is σ = 3914749440. Its totient is φ = 418978560.

The previous prime is 1385866411. The next prime is 1385866453. The reversal of 1385866416 is 6146685831.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1385866411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241630 + ... + 247298.

It is an arithmetic number, because the mean of its divisors is an integer number (48934368).

Almost surely, 2^1385866416 is an apocalyptic number.

1385866416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1385866416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1957374720).

1385866416 is an abundant number, since it is smaller than the sum of its proper divisors (2528883024).

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

1385866416 is a wasteful number, since it uses less digits than its factorization.

1385866416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6154 (or 6148 counting only the distinct ones).

The product of its digits is 829440, while the sum is 48.

The square root of 1385866416 is about 37227.2268104945. The cubic root of 1385866416 is about 1114.9116584945.

The spelling of 1385866416 in words is "one billion, three hundred eighty-five million, eight hundred sixty-six thousand, four hundred sixteen".