1385222816 has 96 divisors (see below), whose sum is σ = 2991038400. Its totient is φ = 628992000.

The previous prime is 1385222791. The next prime is 1385222833. The reversal of 1385222816 is 6182225831.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a self number, because there is not a number n which added to its sum of digits gives 1385222816.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4425476 + ... + 4425788.

It is an arithmetic number, because the mean of its divisors is an integer number (31156650).

Almost surely, 2^1385222816 is an apocalyptic number.

1385222816 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 1385222816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1495519200).

1385222816 is an abundant number, since it is smaller than the sum of its proper divisors (1605815584).

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

1385222816 is a wasteful number, since it uses less digits than its factorization.

1385222816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622 (or 614 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 1385222816 is about 37218.5815957567. The cubic root of 1385222816 is about 1114.7390424708.

The spelling of 1385222816 in words is "one billion, three hundred eighty-five million, two hundred twenty-two thousand, eight hundred sixteen".