1798887 has 4 divisors (see below), whose sum is σ = 2398520. Its totient is φ = 1199256.

The previous prime is 1798871. The next prime is 1798891. The reversal of 1798887 is 7888971.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1798887 - 2⁴ = 1798871 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1798817) 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, 299812 + ... + 299817.

It is an arithmetic number, because the mean of its divisors is an integer number (599630).

2^1798887 is an apocalyptic number.

1798887 is a deficient number, since it is larger than the sum of its proper divisors (599633).

1798887 is an equidigital number, since it uses as much as digits as its factorization.

1798887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599632.

The product of its digits is 225792, while the sum is 48.

The square root of 1798887 is about 1341.2259317505. The cubic root of 1798887 is about 121.6189625538.

The spelling of 1798887 in words is "one million, seven hundred ninety-eight thousand, eight hundred eighty-seven".