1338958 has 4 divisors (see below), whose sum is σ = 2008440. Its totient is φ = 669478.

The previous prime is 1338941. The next prime is 1338979. The reversal of 1338958 is 8598331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8598331 = 7 ⋅1228333.

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 as a sum of consecutive naturals, namely, 334738 + ... + 334741.

It is an arithmetic number, because the mean of its divisors is an integer number (502110).

2^1338958 is an apocalyptic number.

1338958 is a deficient number, since it is larger than the sum of its proper divisors (669482).

1338958 is an equidigital number, since it uses as much as digits as its factorization.

1338958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669481.

The product of its digits is 25920, while the sum is 37.

The square root of 1338958 is about 1157.1335272992. The cubic root of 1338958 is about 110.2187931757.

It can be divided in two parts, 133895 and 8, that added together give a triangular number (133903 = T₅₁₇).

The spelling of 1338958 in words is "one million, three hundred thirty-eight thousand, nine hundred fifty-eight".