1389040371874 has 4 divisors (see below), whose sum is σ = 2083560557814. Its totient is φ = 694520185936.

The previous prime is 1389040371871. The next prime is 1389040371889. The reversal of 1389040371874 is 4781730409831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1252172190025 + 136868181849 = 1119005^2 + 369957^2 .

It is not an unprimeable number, because it can be changed into a prime (1389040371871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347260092967 + ... + 347260092970.

Almost surely, 2^{1389040371874} is an apocalyptic number.

1389040371874 is a deficient number, since it is larger than the sum of its proper divisors (694520185940).

1389040371874 is an equidigital number, since it uses as much as digits as its factorization.

1389040371874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694520185939.

The product of its (nonzero) digits is 4064256, while the sum is 55.

The spelling of 1389040371874 in words is "one trillion, three hundred eighty-nine billion, forty million, three hundred seventy-one thousand, eight hundred seventy-four".