1381384674 has 48 divisors (see below), whose sum is σ = 3172043160. Its totient is φ = 432967680.

The previous prime is 1381384673. The next prime is 1381384681. The reversal of 1381384674 is 4764831831.

It can be written as a sum of positive squares in 4 ways, for example, as 1379602449 + 1782225 = 37143^2 + 1335^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1381384673) 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 23 ways as a sum of consecutive naturals, for example, 638154 + ... + 640314.

Almost surely, 2^1381384674 is an apocalyptic number.

1381384674 is an abundant number, since it is smaller than the sum of its proper divisors (1790658486).

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

1381384674 is a wasteful number, since it uses less digits than its factorization.

1381384674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4275 (or 4272 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 1381384674 is about 37166.9836548515. The cubic root of 1381384674 is about 1113.7085260813.

The spelling of 1381384674 in words is "one billion, three hundred eighty-one million, three hundred eighty-four thousand, six hundred seventy-four".