1678128 has 20 divisors (see below), whose sum is σ = 4335288. Its totient is φ = 559360.

The previous prime is 1678111. The next prime is 1678129. The reversal of 1678128 is 8218761.

It is a happy number.

It is a super-2 number, since 2×1678128² = 5632227168768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1678129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17433 + ... + 17528.

2^1678128 is an apocalyptic number.

It is an amenable number.

1678128 is an abundant number, since it is smaller than the sum of its proper divisors (2657160).

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

1678128 is a wasteful number, since it uses less digits than its factorization.

1678128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34972 (or 34966 counting only the distinct ones).

The product of its digits is 5376, while the sum is 33.

The square root of 1678128 is about 1295.4257987241. The cubic root of 1678128 is about 118.8342677959.

The spelling of 1678128 in words is "one million, six hundred seventy-eight thousand, one hundred twenty-eight".