1385944868 has 96 divisors (see below), whose sum is σ = 3114574848. Its totient is φ = 523958400.

The previous prime is 1385944837. The next prime is 1385944871. The reversal of 1385944868 is 8684495831.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3006158 + ... + 3006618.

It is an arithmetic number, because the mean of its divisors is an integer number (32443488).

Almost surely, 2^1385944868 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 1385944868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1557287424).

1385944868 is an abundant number, since it is smaller than the sum of its proper divisors (1728629980).

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

1385944868 is a wasteful number, since it uses less digits than its factorization.

1385944868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753 (or 751 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 56.

The square root of 1385944868 is about 37228.2804867482. The cubic root of 1385944868 is about 1114.9326959716.

The spelling of 1385944868 in words is "one billion, three hundred eighty-five million, nine hundred forty-four thousand, eight hundred sixty-eight".