1378061289 has 32 divisors (see below), whose sum is σ = 2264947200. Its totient is φ = 821022480.

The previous prime is 1378061231. The next prime is 1378061297. The reversal of 1378061289 is 9821608731.

It is not a de Polignac number, because 1378061289 - 2⁷ = 1378061161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1378061989) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21799 + ... + 56844.

It is an arithmetic number, because the mean of its divisors is an integer number (70779600).

Almost surely, 2^1378061289 is an apocalyptic number.

It is an amenable number.

1378061289 is a deficient number, since it is larger than the sum of its proper divisors (886885911).

1378061289 is a wasteful number, since it uses less digits than its factorization.

1378061289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78722 (or 78716 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 1378061289 is about 37122.2478979924. The cubic root of 1378061289 is about 1112.8146755174.

The spelling of 1378061289 in words is "one billion, three hundred seventy-eight million, sixty-one thousand, two hundred eighty-nine".