1878668 has 12 divisors (see below), whose sum is σ = 3586632. Its totient is φ = 853920.

The previous prime is 1878659. The next prime is 1878677. The reversal of 1878668 is 8668781.

It is an interprime number because it is at equal distance from previous prime (1878659) and next prime (1878677).

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 42697 = 1878668 / (1 + 8 + 7 + 8 + 6 + 6 + 8).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21305 + ... + 21392.

It is an arithmetic number, because the mean of its divisors is an integer number (298886).

2^1878668 is an apocalyptic number.

It is an amenable number.

1878668 is a deficient number, since it is larger than the sum of its proper divisors (1707964).

1878668 is a wasteful number, since it uses less digits than its factorization.

1878668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42712 (or 42710 counting only the distinct ones).

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

The square root of 1878668 is about 1370.6451035917. The cubic root of 1878668 is about 123.3909608139.

The spelling of 1878668 in words is "one million, eight hundred seventy-eight thousand, six hundred sixty-eight".