1385144860 has 24 divisors (see below), whose sum is σ = 3173241456. Its totient is φ = 503688960.

The previous prime is 1385144857. The next prime is 1385144863. The reversal of 1385144860 is 684415831.

It is an interprime number because it is at equal distance from previous prime (1385144857) and next prime (1385144863).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385144863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3147837 + ... + 3148276.

It is an arithmetic number, because the mean of its divisors is an integer number (132218394).

Almost surely, 2^1385144860 is an apocalyptic number.

1385144860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1385144860 is an abundant number, since it is smaller than the sum of its proper divisors (1788096596).

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

1385144860 is a wasteful number, since it uses less digits than its factorization.

1385144860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6296133 (or 6296131 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 1385144860 is about 37217.5343084412. The cubic root of 1385144860 is about 1114.7181307383.

The spelling of 1385144860 in words is "one billion, three hundred eighty-five million, one hundred forty-four thousand, eight hundred sixty".