1381384738 has 16 divisors (see below), whose sum is σ = 2231917056. Its totient is φ = 639349920.

The previous prime is 1381384729. The next prime is 1381384783. The reversal of 1381384738 is 8374831831.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 482931 + ... + 485782.

It is an arithmetic number, because the mean of its divisors is an integer number (139494816).

Almost surely, 2^1381384738 is an apocalyptic number.

1381384738 is a deficient number, since it is larger than the sum of its proper divisors (850532318).

1381384738 is a wasteful number, since it uses less digits than its factorization.

1381384738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968769.

The product of its digits is 387072, while the sum is 46.

The square root of 1381384738 is about 37166.9845158307. The cubic root of 1381384738 is about 1113.7085432808.

The spelling of 1381384738 in words is "one billion, three hundred eighty-one million, three hundred eighty-four thousand, seven hundred thirty-eight".