1380689658 has 32 divisors (see below), whose sum is σ = 3099841920. Its totient is φ = 455483520.

The previous prime is 1380689647. The next prime is 1380689659. The reversal of 1380689658 is 8569860831.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1380689659) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 126558 + ... + 137033.

It is an arithmetic number, because the mean of its divisors is an integer number (96870060).

Almost surely, 2^1380689658 is an apocalyptic number.

1380689658 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1380689658 is an abundant number, since it is smaller than the sum of its proper divisors (1719152262).

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

1380689658 is a wasteful number, since it uses less digits than its factorization.

1380689658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263699 (or 263693 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The square root of 1380689658 is about 37157.6325672129. The cubic root of 1380689658 is about 1113.5217147098.

The spelling of 1380689658 in words is "one billion, three hundred eighty million, six hundred eighty-nine thousand, six hundred fifty-eight".