1388810868 has 24 divisors (see below), whose sum is σ = 3245494560. Its totient is φ = 462231840.

The previous prime is 1388810867. The next prime is 1388810921. The reversal of 1388810868 is 8680188831.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1388810868.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388810867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79903 + ... + 95718.

It is an arithmetic number, because the mean of its divisors is an integer number (135228940).

Almost surely, 2^1388810868 is an apocalyptic number.

It is an amenable number.

1388810868 is an abundant number, since it is smaller than the sum of its proper divisors (1856683692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1388810868 is a wasteful number, since it uses less digits than its factorization.

1388810868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176287 (or 176285 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 51.

The square root of 1388810868 is about 37266.7528502283. The cubic root of 1388810868 is about 1115.7006911775.

The spelling of 1388810868 in words is "one billion, three hundred eighty-eight million, eight hundred ten thousand, eight hundred sixty-eight".