1388127788 has 12 divisors (see below), whose sum is σ = 2432743992. Its totient is φ = 693058080.

The previous prime is 1388127787. The next prime is 1388127803. The reversal of 1388127788 is 8877218831.

It is not an unprimeable number, because it can be changed into a prime (1388127787) 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, 248345 + ... + 253872.

It is an arithmetic number, because the mean of its divisors is an integer number (202728666).

Almost surely, 2^1388127788 is an apocalyptic number.

It is an amenable number.

1388127788 is a deficient number, since it is larger than the sum of its proper divisors (1044616204).

1388127788 is a wasteful number, since it uses less digits than its factorization.

1388127788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502912 (or 502910 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 53.

The square root of 1388127788 is about 37257.5869857402. The cubic root of 1388127788 is about 1115.5177438262.

The spelling of 1388127788 in words is "one billion, three hundred eighty-eight million, one hundred twenty-seven thousand, seven hundred eighty-eight".