1381428568 has 32 divisors (see below), whose sum is σ = 2953510560. Its totient is φ = 600076800.

The previous prime is 1381428547. The next prime is 1381428569. The reversal of 1381428568 is 8658241831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381428569) 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, 388908 + ... + 392443.

It is an arithmetic number, because the mean of its divisors is an integer number (92297205).

Almost surely, 2^1381428568 is an apocalyptic number.

It is an amenable number.

1381428568 is an abundant number, since it is smaller than the sum of its proper divisors (1572081992).

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

1381428568 is a wasteful number, since it uses less digits than its factorization.

1381428568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781387 (or 781383 counting only the distinct ones).

The product of its digits is 368640, while the sum is 46.

The square root of 1381428568 is about 37167.5741473667. The cubic root of 1381428568 is about 1113.7203221207.

The spelling of 1381428568 in words is "one billion, three hundred eighty-one million, four hundred twenty-eight thousand, five hundred sixty-eight".