1378861143 has 32 divisors (see below), whose sum is σ = 2142484992. Its totient is φ = 779520000.

The previous prime is 1378861123. The next prime is 1378861151. The reversal of 1378861143 is 3411688731.

It is not a de Polignac number, because 1378861143 - 2⁹ = 1378860631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1378861095 and 1378861104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378861123) 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, 52518 + ... + 74268.

It is an arithmetic number, because the mean of its divisors is an integer number (66952656).

Almost surely, 2^1378861143 is an apocalyptic number.

1378861143 is a deficient number, since it is larger than the sum of its proper divisors (763623849).

1378861143 is a wasteful number, since it uses less digits than its factorization.

1378861143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21895.

The product of its digits is 96768, while the sum is 42.

The square root of 1378861143 is about 37133.0195782675. The cubic root of 1378861143 is about 1113.0299337509.

The spelling of 1378861143 in words is "one billion, three hundred seventy-eight million, eight hundred sixty-one thousand, one hundred forty-three".