1378086764 has 6 divisors (see below), whose sum is σ = 2411651844. Its totient is φ = 689043380.

The previous prime is 1378086751. The next prime is 1378086781. The reversal of 1378086764 is 4676808731.

It is a super-2 number, since 2×1378086764² = 3798246258223983392, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 172260842 + ... + 172260849.

It is an arithmetic number, because the mean of its divisors is an integer number (401941974).

Almost surely, 2^1378086764 is an apocalyptic number.

It is an amenable number.

1378086764 is a deficient number, since it is larger than the sum of its proper divisors (1033565080).

1378086764 is a wasteful number, since it uses less digits than its factorization.

1378086764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344521695 (or 344521693 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 50.

The square root of 1378086764 is about 37122.5910194857. The cubic root of 1378086764 is about 1112.8215326819.

The spelling of 1378086764 in words is "one billion, three hundred seventy-eight million, eighty-six thousand, seven hundred sixty-four".