1788864 has 112 divisors (see below), whose sum is σ = 5949696. Its totient is φ = 464640.

The previous prime is 1788863. The next prime is 1788881. The reversal of 1788864 is 4688871.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1788863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162619 + ... + 162629.

2^1788864 is an apocalyptic number.

1788864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1788864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2974848).

1788864 is an abundant number, since it is smaller than the sum of its proper divisors (4160832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1788864 is an equidigital number, since it uses as much as digits as its factorization.

1788864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55 (or 23 counting only the distinct ones).

The product of its digits is 86016, while the sum is 42.

The square root of 1788864 is about 1337.4842055142. The cubic root of 1788864 is about 121.3926637608.

The spelling of 1788864 in words is "one million, seven hundred eighty-eight thousand, eight hundred sixty-four".