1678434 has 16 divisors (see below), whose sum is σ = 3400320. Its totient is φ = 552240.

The previous prime is 1678429. The next prime is 1678459. The reversal of 1678434 is 4348761.

1678434 is nontrivially palindromic in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 1678395 and 1678404.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1297 + ... + 2244.

It is an arithmetic number, because the mean of its divisors is an integer number (212520).

2^1678434 is an apocalyptic number.

1678434 is an abundant number, since it is smaller than the sum of its proper divisors (1721886).

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

1678434 is a wasteful number, since it uses less digits than its factorization.

1678434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3625.

The product of its digits is 16128, while the sum is 33.

The square root of 1678434 is about 1295.5439012245. The cubic root of 1678434 is about 118.8414903431.

It can be divided in two parts, 1678 and 434, that added together give a palindrome (2112).

The spelling of 1678434 in words is "one million, six hundred seventy-eight thousand, four hundred thirty-four".