1438720 has 44 divisors (see below), whose sum is σ = 3463524. Its totient is φ = 573440.

The previous prime is 1438709. The next prime is 1438721. The reversal of 1438720 is 278341.

It can be written as a sum of positive squares in 2 ways, for example, as 746496 + 692224 = 864^2 + 832^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4980 + ... + 5260.

2^1438720 is an apocalyptic number.

1438720 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 1438720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1731762).

1438720 is an abundant number, since it is smaller than the sum of its proper divisors (2024804).

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

1438720 is an equidigital number, since it uses as much as digits as its factorization.

1438720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 1438720 is about 1199.4665480954. The cubic root of 1438720 is about 112.8908544882.

The spelling of 1438720 in words is "one million, four hundred thirty-eight thousand, seven hundred twenty".