1338940 has 12 divisors (see below), whose sum is σ = 2811816. Its totient is φ = 535568.

The previous prime is 1338923. The next prime is 1338941. The reversal of 1338940 is 498331.

It is a junction number, because it is equal to n+sod(n) for n = 1338899 and 1338908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1338941) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 33454 + ... + 33493.

It is an arithmetic number, because the mean of its divisors is an integer number (234318).

2^1338940 is an apocalyptic number.

1338940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1338940 is an abundant number, since it is smaller than the sum of its proper divisors (1472876).

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

1338940 is a wasteful number, since it uses less digits than its factorization.

1338940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66956 (or 66954 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1338940 is about 1157.1257494326. The cubic root of 1338940 is about 110.2182992724.

It can be divided in two parts, 1338 and 940, that added together give a triangular number (2278 = T₆₇).

The spelling of 1338940 in words is "one million, three hundred thirty-eight thousand, nine hundred forty".