1382256638 has 64 divisors (see below), whose sum is σ = 2608588800. Its totient is φ = 535610880.

The previous prime is 1382256581. The next prime is 1382256641. The reversal of 1382256638 is 8366522831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1870073 + ... + 1870811.

It is an arithmetic number, because the mean of its divisors is an integer number (40759200).

Almost surely, 2^1382256638 is an apocalyptic number.

1382256638 is a deficient number, since it is larger than the sum of its proper divisors (1226332162).

1382256638 is a wasteful number, since it uses less digits than its factorization.

1382256638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065.

The product of its digits is 414720, while the sum is 44.

The square root of 1382256638 is about 37178.7121616658. The cubic root of 1382256638 is about 1113.9428102023.

The spelling of 1382256638 in words is "one billion, three hundred eighty-two million, two hundred fifty-six thousand, six hundred thirty-eight".