1389244488 has 64 divisors (see below), whose sum is σ = 3681961920. Its totient is φ = 435302400.

The previous prime is 1389244481. The next prime is 1389244499. The reversal of 1389244488 is 8844429831.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 1389244488.

It is not an unprimeable number, because it can be changed into a prime (1389244481) 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, 443568 + ... + 446688.

It is an arithmetic number, because the mean of its divisors is an integer number (57530655).

Almost surely, 2^1389244488 is an apocalyptic number.

It is an amenable number.

1389244488 is an abundant number, since it is smaller than the sum of its proper divisors (2292717432).

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

1389244488 is a wasteful number, since it uses less digits than its factorization.

1389244488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4238 (or 4234 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 51.

The square root of 1389244488 is about 37272.5701823741. The cubic root of 1389244488 is about 1115.8167952498.

The spelling of 1389244488 in words is "one billion, three hundred eighty-nine million, two hundred forty-four thousand, four hundred eighty-eight".