1389718488 has 32 divisors (see below), whose sum is σ = 3475614960. Its totient is φ = 463063680.

The previous prime is 1389718487. The next prime is 1389718511. The reversal of 1389718488 is 8848179831.

It is a super-2 number, since 2×1389718488² = 3862634951778012288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389718487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64006 + ... + 82922.

Almost surely, 2^1389718488 is an apocalyptic number.

It is an amenable number.

1389718488 is an abundant number, since it is smaller than the sum of its proper divisors (2085896472).

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

1389718488 is a wasteful number, since it uses less digits than its factorization.

1389718488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21987 (or 21983 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 57.

The square root of 1389718488 is about 37278.9282034771. The cubic root of 1389718488 is about 1115.9436836473.

It can be divided in two parts, 13897 and 18488, that added together give a triangular number (32385 = T₂₅₄).

The spelling of 1389718488 in words is "one billion, three hundred eighty-nine million, seven hundred eighteen thousand, four hundred eighty-eight".