1385183778 has 32 divisors (see below), whose sum is σ = 3024855360. Its totient is φ = 419386560.

The previous prime is 1385183741. The next prime is 1385183797. The reversal of 1385183778 is 8773815831.

It is a self number, because there is not a number n which added to its sum of digits gives 1385183778.

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, 72576 + ... + 89652.

It is an arithmetic number, because the mean of its divisors is an integer number (94526730).

Almost surely, 2^1385183778 is an apocalyptic number.

1385183778 is an abundant number, since it is smaller than the sum of its proper divisors (1639671582).

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

1385183778 is a wasteful number, since it uses less digits than its factorization.

1385183778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18322.

The product of its digits is 1128960, while the sum is 51.

The square root of 1385183778 is about 37218.0571497224. The cubic root of 1385183778 is about 1114.7285706076.

The spelling of 1385183778 in words is "one billion, three hundred eighty-five million, one hundred eighty-three thousand, seven hundred seventy-eight".