1380689986 has 72 divisors (see below), whose sum is σ = 2505433140. Its totient is φ = 567074304.

The previous prime is 1380689983. The next prime is 1380690049. The reversal of 1380689986 is 6899860831.

It can be written as a sum of positive squares in 6 ways, for example, as 1044517761 + 336172225 = 32319^2 + 18335^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1380689986.

It is not an unprimeable number, because it can be changed into a prime (1380689983) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2712300 + ... + 2712808.

Almost surely, 2^1380689986 is an apocalyptic number.

1380689986 is a deficient number, since it is larger than the sum of its proper divisors (1124743154).

1380689986 is a wasteful number, since it uses less digits than its factorization.

1380689986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596 (or 560 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 58.

The square root of 1380689986 is about 37157.6369808415. The cubic root of 1380689986 is about 1113.5218028868.

The spelling of 1380689986 in words is "one billion, three hundred eighty million, six hundred eighty-nine thousand, nine hundred eighty-six".