1385186216 has 8 divisors (see below), whose sum is σ = 2597224170. Its totient is φ = 692593104.

The previous prime is 1385186183. The next prime is 1385186221. The reversal of 1385186216 is 6126815831.

It can be written as a sum of positive squares in only one way, i.e., 1119170116 + 266016100 = 33454^2 + 16310^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 86574131 + ... + 86574146.

Almost surely, 2^1385186216 is an apocalyptic number.

It is an amenable number.

1385186216 is a deficient number, since it is larger than the sum of its proper divisors (1212037954).

1385186216 is a wasteful number, since it uses less digits than its factorization.

1385186216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173148283 (or 173148279 counting only the distinct ones).

The product of its digits is 69120, while the sum is 41.

The square root of 1385186216 is about 37218.0899026267. The cubic root of 1385186216 is about 1114.7292246018.

The spelling of 1385186216 in words is "one billion, three hundred eighty-five million, one hundred eighty-six thousand, two hundred sixteen".