1889887 has 8 divisors (see below), whose sum is σ = 1990656. Its totient is φ = 1790712.

The previous prime is 1889831. The next prime is 1889957. The reversal of 1889887 is 7889881.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1889887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1889887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1889087) 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, 2598 + ... + 3244.

It is an arithmetic number, because the mean of its divisors is an integer number (248832).

2^1889887 is an apocalyptic number.

1889887 is a deficient number, since it is larger than the sum of its proper divisors (100769).

1889887 is a wasteful number, since it uses less digits than its factorization.

1889887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797.

The product of its digits is 258048, while the sum is 49.

The square root of 1889887 is about 1374.7316101698. The cubic root of 1889887 is about 123.6360948963.

The spelling of 1889887 in words is "one million, eight hundred eighty-nine thousand, eight hundred eighty-seven".