1378556684 has 12 divisors (see below), whose sum is σ = 2423909208. Its totient is φ = 686011200.

The previous prime is 1378556677. The next prime is 1378556687. The reversal of 1378556684 is 4866558731.

It is not an unprimeable number, because it can be changed into a prime (1378556687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 815837 + ... + 817524.

It is an arithmetic number, because the mean of its divisors is an integer number (201992434).

Almost surely, 2^1378556684 is an apocalyptic number.

It is an amenable number.

1378556684 is a deficient number, since it is larger than the sum of its proper divisors (1045352524).

1378556684 is a wasteful number, since it uses less digits than its factorization.

1378556684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633576 (or 1633574 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 53.

The square root of 1378556684 is about 37128.9197796004. The cubic root of 1378556684 is about 1112.9480069795.

The spelling of 1378556684 in words is "one billion, three hundred seventy-eight million, five hundred fifty-six thousand, six hundred eighty-four".