1387822768 has 20 divisors (see below), whose sum is σ = 2746118880. Its totient is φ = 679146944.

The previous prime is 1387822739. The next prime is 1387822769. The reversal of 1387822768 is 8672287831.

It is not an unprimeable number, because it can be changed into a prime (1387822769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 922003 + ... + 923506.

It is an arithmetic number, because the mean of its divisors is an integer number (137305944).

Almost surely, 2^1387822768 is an apocalyptic number.

It is an amenable number.

1387822768 is a deficient number, since it is larger than the sum of its proper divisors (1358296112).

1387822768 is a wasteful number, since it uses less digits than its factorization.

1387822768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845564 (or 1845558 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 52.

The square root of 1387822768 is about 37253.4933663945. The cubic root of 1387822768 is about 1115.4360318133.

The spelling of 1387822768 in words is "one billion, three hundred eighty-seven million, eight hundred twenty-two thousand, seven hundred sixty-eight".