1338730 has 8 divisors (see below), whose sum is σ = 2409732. Its totient is φ = 535488.

The previous prime is 1338703. The next prime is 1338731. The reversal of 1338730 is 378331.

It can be written as a sum of positive squares in 2 ways, for example, as 1338649 + 81 = 1157^2 + 9^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1338695 and 1338704.

It is not an unprimeable number, because it can be changed into a prime (1338731) 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, 66927 + ... + 66946.

2^1338730 is an apocalyptic number.

1338730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1338730 is a deficient number, since it is larger than the sum of its proper divisors (1071002).

1338730 is a wasteful number, since it uses less digits than its factorization.

1338730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133880.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 1338730 is about 1157.0350037920. The cubic root of 1338730 is about 110.2125367406.

The spelling of 1338730 in words is "one million, three hundred thirty-eight thousand, seven hundred thirty".