1387765748 has 6 divisors (see below), whose sum is σ = 2428590066. Its totient is φ = 693882872.

The previous prime is 1387765733. The next prime is 1387765751. The reversal of 1387765748 is 8475677831.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1372850704 + 14915044 = 37052^2 + 3862^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1387765693 and 1387765702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173470715 + ... + 173470722.

It is an arithmetic number, because the mean of its divisors is an integer number (404765011).

Almost surely, 2^1387765748 is an apocalyptic number.

It is an amenable number.

1387765748 is a deficient number, since it is larger than the sum of its proper divisors (1040824318).

1387765748 is a wasteful number, since it uses less digits than its factorization.

1387765748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346941441 (or 346941439 counting only the distinct ones).

The product of its digits is 7902720, while the sum is 56.

The square root of 1387765748 is about 37252.7280611769. The cubic root of 1387765748 is about 1115.4207553589.

The spelling of 1387765748 in words is "one billion, three hundred eighty-seven million, seven hundred sixty-five thousand, seven hundred forty-eight".