1788879 has 4 divisors (see below), whose sum is σ = 2385176. Its totient is φ = 1192584.

The previous prime is 1788863. The next prime is 1788881. The reversal of 1788879 is 9788871.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9788871 = 3 ⋅3262957.

It is not a de Polignac number, because 1788879 - 2⁴ = 1788863 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 (1780879) 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, 298144 + ... + 298149.

It is an arithmetic number, because the mean of its divisors is an integer number (596294).

2^1788879 is an apocalyptic number.

1788879 is a deficient number, since it is larger than the sum of its proper divisors (596297).

1788879 is an equidigital number, since it uses as much as digits as its factorization.

1788879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596296.

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

The square root of 1788879 is about 1337.4898130453. The cubic root of 1788879 is about 121.3930030608.

The spelling of 1788879 in words is "one million, seven hundred eighty-eight thousand, eight hundred seventy-nine".