1378556712 has 256 divisors, whose sum is σ = 4300128000. Its totient is φ = 406508544.

The previous prime is 1378556687. The next prime is 1378556713. The reversal of 1378556712 is 2176558731.

It is a happy number.

1378556712 is a `hidden beast` number, since 1 + 3 + 7 + 85 + 567 + 1 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (1378556713) 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 63 ways as a sum of consecutive naturals, for example, 8780538 + ... + 8780694.

It is an arithmetic number, because the mean of its divisors is an integer number (16797375).

Almost surely, 2^1378556712 is an apocalyptic number.

1378556712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1378556712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2150064000).

1378556712 is an abundant number, since it is smaller than the sum of its proper divisors (2921571288).

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

1378556712 is a wasteful number, since it uses less digits than its factorization.

1378556712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297 (or 287 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The square root of 1378556712 is about 37128.9201566649. The cubic root of 1378556712 is about 1112.9480145146.

The spelling of 1378556712 in words is "one billion, three hundred seventy-eight million, five hundred fifty-six thousand, seven hundred twelve".