1380657786 has 8 divisors (see below), whose sum is σ = 2761315584. Its totient is φ = 460219260.

The previous prime is 1380657749. The next prime is 1380657809. The reversal of 1380657786 is 6877560831.

It is a sphenic number, since it is the product of 3 distinct primes.

1380657786 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115054810 + ... + 115054821.

It is an arithmetic number, because the mean of its divisors is an integer number (345164448).

Almost surely, 2^1380657786 is an apocalyptic number.

1380657786 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1380657786 is a wasteful number, since it uses less digits than its factorization.

1380657786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230109636.

The product of its (nonzero) digits is 1693440, while the sum is 51.

The square root of 1380657786 is about 37157.2036891906. The cubic root of 1380657786 is about 1113.5131464225.

The spelling of 1380657786 in words is "one billion, three hundred eighty million, six hundred fifty-seven thousand, seven hundred eighty-six".