1489440 has 96 divisors (see below), whose sum is σ = 4898880. Its totient is φ = 379904.

The previous prime is 1489409. The next prime is 1489441. The reversal of 1489440 is 449841.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1489398 and 1489407.

It is not an unprimeable number, because it can be changed into a prime (1489441) 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, 13867 + ... + 13973.

It is an arithmetic number, because the mean of its divisors is an integer number (51030).

2^1489440 is an apocalyptic number.

1489440 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 1489440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2449440).

1489440 is an abundant number, since it is smaller than the sum of its proper divisors (3409440).

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

1489440 is a wasteful number, since it uses less digits than its factorization.

1489440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 1489440 is about 1220.4261550786. The cubic root of 1489440 is about 114.2021651263.

The spelling of 1489440 in words is "one million, four hundred eighty-nine thousand, four hundred forty".