1868889 has 8 divisors (see below), whose sum is σ = 2718432. Its totient is φ = 1132640.

The previous prime is 1868879. The next prime is 1868917. The reversal of 1868889 is 9888681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1868889 - 2¹⁶ = 1803353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1868879) 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, 28284 + ... + 28349.

It is an arithmetic number, because the mean of its divisors is an integer number (339804).

2^1868889 is an apocalyptic number.

It is an amenable number.

1868889 is a deficient number, since it is larger than the sum of its proper divisors (849543).

1868889 is a wasteful number, since it uses less digits than its factorization.

1868889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56647.

The product of its digits is 221184, while the sum is 48.

The square root of 1868889 is about 1367.0731509323. The cubic root of 1868889 is about 123.1764932734.

The spelling of 1868889 in words is "one million, eight hundred sixty-eight thousand, eight hundred eighty-nine".