1385887188 has 144 divisors (see below), whose sum is σ = 3869087040. Its totient is φ = 384846336.

The previous prime is 1385887163. The next prime is 1385887247. The reversal of 1385887188 is 8817885831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3562498 + ... + 3562886.

It is an arithmetic number, because the mean of its divisors is an integer number (26868660).

Almost surely, 2^1385887188 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1385887188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1934543520).

1385887188 is an abundant number, since it is smaller than the sum of its proper divisors (2483199852).

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

1385887188 is a wasteful number, since it uses less digits than its factorization.

1385887188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566 (or 557 counting only the distinct ones).

The product of its digits is 3440640, while the sum is 57.

The square root of 1385887188 is about 37227.5057988042. The cubic root of 1385887188 is about 1114.9172287354.

The spelling of 1385887188 in words is "one billion, three hundred eighty-five million, eight hundred eighty-seven thousand, one hundred eighty-eight".