1678338 has 12 divisors (see below), whose sum is σ = 3636438. Its totient is φ = 559440.

The previous prime is 1678337. The next prime is 1678349. The reversal of 1678338 is 8338761.

It can be written as a sum of positive squares in only one way, i.e., 1238769 + 439569 = 1113^2 + 663^2 .

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1678331) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46603 + ... + 46638.

2^1678338 is an apocalyptic number.

1678338 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1678338 is an abundant number, since it is smaller than the sum of its proper divisors (1958100).

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

1678338 is a wasteful number, since it uses less digits than its factorization.

1678338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93249 (or 93246 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 1678338 is about 1295.5068506187. The cubic root of 1678338 is about 118.8392245405.

It can be divided in two parts, 1678 and 338, that added together give a triangular number (2016 = T₆₃).

The spelling of 1678338 in words is "one million, six hundred seventy-eight thousand, three hundred thirty-eight".