1438280 has 32 divisors (see below), whose sum is σ = 3318840. Its totient is φ = 560640.

The previous prime is 1438279. The next prime is 1438291. The reversal of 1438280 is 828341.

It can be written as a sum of positive squares in 4 ways, for example, as 1036324 + 401956 = 1018^2 + 634^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1202 + ... + 2078.

2^1438280 is an apocalyptic number.

1438280 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 1438280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1659420).

1438280 is an abundant number, since it is smaller than the sum of its proper divisors (1880560).

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

1438280 is a wasteful number, since it uses less digits than its factorization.

1438280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929 (or 925 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 1438280 is about 1199.2831192008. The cubic root of 1438280 is about 112.8793449426.

The spelling of 1438280 in words is "one million, four hundred thirty-eight thousand, two hundred eighty".