1385965887 has 32 divisors (see below), whose sum is σ = 2015569920. Its totient is φ = 843903360.

The previous prime is 1385965879. The next prime is 1385965913. The reversal of 1385965887 is 7885695831.

1385965887 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1385965887 - 2³ = 1385965879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1385965887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385965877) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 516393 + ... + 519069.

It is an arithmetic number, because the mean of its divisors is an integer number (62986560).

Almost surely, 2^1385965887 is an apocalyptic number.

1385965887 is a deficient number, since it is larger than the sum of its proper divisors (629604033).

1385965887 is a wasteful number, since it uses less digits than its factorization.

1385965887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3023.

The product of its digits is 14515200, while the sum is 60.

The square root of 1385965887 is about 37228.5627845073. The cubic root of 1385965887 is about 1114.9383322352.

The spelling of 1385965887 in words is "one billion, three hundred eighty-five million, nine hundred sixty-five thousand, eight hundred eighty-seven".