1388148872 has 64 divisors (see below), whose sum is σ = 3013977600. Its totient is φ = 592368640.

The previous prime is 1388148871. The next prime is 1388148893. The reversal of 1388148872 is 2788418831.

It is a self number, because there is not a number n which added to its sum of digits gives 1388148872.

It is not an unprimeable number, because it can be changed into a prime (1388148871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 760553 + ... + 762375.

It is an arithmetic number, because the mean of its divisors is an integer number (47093400).

Almost surely, 2^1388148872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1388148872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1506988800).

1388148872 is an abundant number, since it is smaller than the sum of its proper divisors (1625828728).

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

1388148872 is a wasteful number, since it uses less digits than its factorization.

1388148872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2366 (or 2362 counting only the distinct ones).

The product of its digits is 688128, while the sum is 50.

The square root of 1388148872 is about 37257.8699337469. The cubic root of 1388148872 is about 1115.5233915908.

The spelling of 1388148872 in words is "one billion, three hundred eighty-eight million, one hundred forty-eight thousand, eight hundred seventy-two".