1678868 has 24 divisors (see below), whose sum is σ = 3122280. Its totient is φ = 788480.

The previous prime is 1678861. The next prime is 1678871. The reversal of 1678868 is 8688761.

It can be written as a sum of positive squares in 4 ways, for example, as 9604 + 1669264 = 98^2 + 1292^2 .

It is a super-2 number, since 2×1678868² = 5637195522848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1678861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4580 + ... + 4932.

It is an arithmetic number, because the mean of its divisors is an integer number (130095).

2^1678868 is an apocalyptic number.

It is an amenable number.

1678868 is a deficient number, since it is larger than the sum of its proper divisors (1443412).

1678868 is a wasteful number, since it uses less digits than its factorization.

1678868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 425 counting only the distinct ones).

The product of its digits is 129024, while the sum is 44.

The square root of 1678868 is about 1295.7113876169. The cubic root of 1678868 is about 118.8517325812.

The spelling of 1678868 in words is "one million, six hundred seventy-eight thousand, eight hundred sixty-eight".