1489443840 has 132 divisors (see below), whose sum is σ = 5161043784. Its totient is φ = 397172736.

The previous prime is 1489443833. The next prime is 1489443911. The reversal of 1489443840 is 483449841.

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

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 29919 + ... + 62241.

Almost surely, 2^1489443840 is an apocalyptic number.

1489443840 is a gapful number since it is divisible by the number (10) 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 1489443840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2580521892).

1489443840 is an abundant number, since it is smaller than the sum of its proper divisors (3671599944).

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

1489443840 is a wasteful number, since it uses less digits than its factorization.

1489443840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32354 (or 32333 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The square root of 1489443840 is about 38593.3134104860. The cubic root of 1489443840 is about 1142.0226326968.

The spelling of 1489443840 in words is "one billion, four hundred eighty-nine million, four hundred forty-three thousand, eight hundred forty".