1438140 has 48 divisors (see below), whose sum is σ = 4394880. Its totient is φ = 348480.

The previous prime is 1438123. The next prime is 1438159. The reversal of 1438140 is 418341.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 430 + ... + 1749.

It is an arithmetic number, because the mean of its divisors is an integer number (91560).

2^1438140 is an apocalyptic number.

1438140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1438140 is an abundant number, since it is smaller than the sum of its proper divisors (2956740).

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

1438140 is a wasteful number, since it uses less digits than its factorization.

1438140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2202 (or 2200 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1438140 is about 1199.2247495778. The cubic root of 1438140 is about 112.8756823222.

The spelling of 1438140 in words is "one million, four hundred thirty-eight thousand, one hundred forty".