1338840 has 48 divisors (see below), whose sum is σ = 4352400. Its totient is φ = 356928.

The previous prime is 1338823. The next prime is 1338851. The reversal of 1338840 is 488331.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1500 + ... + 2219.

It is an arithmetic number, because the mean of its divisors is an integer number (90675).

2^1338840 is an apocalyptic number.

1338840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1338840 is an abundant number, since it is smaller than the sum of its proper divisors (3013560).

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

1338840 is a wasteful number, since it uses less digits than its factorization.

1338840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3736 (or 3729 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1338840 is about 1157.0825381104. The cubic root of 1338840 is about 110.2155552848.

The spelling of 1338840 in words is "one million, three hundred thirty-eight thousand, eight hundred forty".