1439264 has 24 divisors (see below), whose sum is σ = 2905308. Its totient is φ = 701440.

The previous prime is 1439261. The next prime is 1439267. The reversal of 1439264 is 4629341.

It is an interprime number because it is at equal distance from previous prime (1439261) and next prime (1439267).

It can be written as a sum of positive squares in 2 ways, for example, as 1227664 + 211600 = 1108^2 + 460^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1439261) 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, 764 + ... + 1860.

2^1439264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1439264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1452654).

1439264 is an abundant number, since it is smaller than the sum of its proper divisors (1466044).

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

1439264 is a wasteful number, since it uses less digits than its factorization.

1439264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148 (or 1140 counting only the distinct ones).

The product of its digits is 5184, while the sum is 29.

The square root of 1439264 is about 1199.6932941381. The cubic root of 1439264 is about 112.9050812282.

The spelling of 1439264 in words is "one million, four hundred thirty-nine thousand, two hundred sixty-four".