1380764638 has 24 divisors (see below), whose sum is σ = 2293222176. Its totient is φ = 623024160.

The previous prime is 1380764629. The next prime is 1380764657. The reversal of 1380764638 is 8364670831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12331 + ... + 53977.

It is an arithmetic number, because the mean of its divisors is an integer number (95550924).

Almost surely, 2^1380764638 is an apocalyptic number.

1380764638 is a deficient number, since it is larger than the sum of its proper divisors (912457538).

1380764638 is a wasteful number, since it uses less digits than its factorization.

1380764638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41808 (or 41797 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The square root of 1380764638 is about 37158.6414983110. The cubic root of 1380764638 is about 1113.5418713869.

The spelling of 1380764638 in words is "one billion, three hundred eighty million, seven hundred sixty-four thousand, six hundred thirty-eight".