1389124485 has 320 divisors, whose sum is σ = 3337044480. Its totient is φ = 537477120.

The previous prime is 1389124483. The next prime is 1389124489. The reversal of 1389124485 is 5844219831.

It is not a de Polignac number, because 1389124485 - 2¹ = 1389124483 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1389124485.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389124483) by changing a digit.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 33881065 + ... + 33881105.

It is an arithmetic number, because the mean of its divisors is an integer number (10428264).

Almost surely, 2^1389124485 is an apocalyptic number.

1389124485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1389124485 is an abundant number, since it is smaller than the sum of its proper divisors (1947919995).

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

1389124485 is a wasteful number, since it uses less digits than its factorization.

1389124485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 129 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 1389124485 is about 37270.9603444827. The cubic root of 1389124485 is about 1115.7846662234.

The spelling of 1389124485 in words is "one billion, three hundred eighty-nine million, one hundred twenty-four thousand, four hundred eighty-five".