338978 has 4 divisors (see below), whose sum is σ = 508470. Its totient is φ = 169488.

The previous prime is 338959. The next prime is 338993. The reversal of 338978 is 879833.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 879833 = 19 ⋅46307.

It can be written as a sum of positive squares in only one way, i.e., 214369 + 124609 = 463^2 + 353^2 .

It is a super-2 number, since 2×338978² = 229812168968, which contains 22 as substring.

It is an unprimeable number.

338978 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84743 + ... + 84746.

2³³⁸⁹⁷⁸ is an apocalyptic number.

338978 is a deficient number, since it is larger than the sum of its proper divisors (169492).

338978 is a wasteful number, since it uses less digits than its factorization.

338978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169491.

The product of its digits is 36288, while the sum is 38.

The square root of 338978 is about 582.2181721657. The cubic root of 338978 is about 69.7253181085.

The spelling of 338978 in words is "three hundred thirty-eight thousand, nine hundred seventy-eight".