1678842 has 48 divisors (see below), whose sum is σ = 4062240. Its totient is φ = 496800.

The previous prime is 1678837. The next prime is 1678843. The reversal of 1678842 is 2488761.

It is a junction number, because it is equal to n+sod(n) for n = 1678797 and 1678806.

It is not an unprimeable number, because it can be changed into a prime (1678843) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12009 + ... + 12147.

It is an arithmetic number, because the mean of its divisors is an integer number (84630).

2^1678842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1678842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2031120).

1678842 is an abundant number, since it is smaller than the sum of its proper divisors (2383398).

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

1678842 is a wasteful number, since it uses less digits than its factorization.

1678842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 216 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 1678842 is about 1295.7013544795. The cubic root of 1678842 is about 118.8511190406.

It can be divided in two parts, 167 and 8842, that added together give a palindrome (9009).

The spelling of 1678842 in words is "one million, six hundred seventy-eight thousand, eight hundred forty-two".