1385511960 has 64 divisors (see below), whose sum is σ = 4750329600. Its totient is φ = 316688256.

The previous prime is 1385511931. The next prime is 1385511983. The reversal of 1385511960 is 691155831.

It is a congruent number.

It is an unprimeable number.

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, 823870 + ... + 825549.

It is an arithmetic number, because the mean of its divisors is an integer number (74223900).

Almost surely, 2^1385511960 is an apocalyptic number.

1385511960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1385511960 is an abundant number, since it is smaller than the sum of its proper divisors (3364817640).

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

1385511960 is a wasteful number, since it uses less digits than its factorization.

1385511960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649440 (or 1649436 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 39.

The square root of 1385511960 is about 37222.4657968813. The cubic root of 1385511960 is about 1114.8165986295.

The spelling of 1385511960 in words is "one billion, three hundred eighty-five million, five hundred eleven thousand, nine hundred sixty".