1489642128 has 120 divisors (see below), whose sum is σ = 4540568760. Its totient is φ = 453150720.

The previous prime is 1489642103. The next prime is 1489642151. The reversal of 1489642128 is 8212469841.

1489642128 is a `hidden beast` number, since 1 + 489 + 6 + 42 + 128 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 18766224 + 1470875904 = 4332^2 + 38352^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 162138 + ... + 171078.

It is an arithmetic number, because the mean of its divisors is an integer number (37838073).

Almost surely, 2^1489642128 is an apocalyptic number.

1489642128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1489642128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2270284380).

1489642128 is an abundant number, since it is smaller than the sum of its proper divisors (3050926632).

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

1489642128 is a wasteful number, since it uses less digits than its factorization.

1489642128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9057 (or 9048 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 1489642128 is about 38595.8822674129. The cubic root of 1489642128 is about 1142.0733091818.

The spelling of 1489642128 in words is "one billion, four hundred eighty-nine million, six hundred forty-two thousand, one hundred twenty-eight".