1383864 has 48 divisors (see below), whose sum is σ = 3649800. Its totient is φ = 437184.

The previous prime is 1383857. The next prime is 1383881. The reversal of 1383864 is 4683831.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12642 + ... + 12750.

2^1383864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1383864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1824900).

1383864 is an abundant number, since it is smaller than the sum of its proper divisors (2265936).

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

1383864 is a wasteful number, since it uses less digits than its factorization.

1383864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164 (or 137 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 1383864 is about 1176.3774904341. The cubic root of 1383864 is about 111.4374427050.

Subtracting from 1383864 its sum of digits (33), we obtain a palindrome (1383831).

The spelling of 1383864 in words is "one million, three hundred eighty-three thousand, eight hundred sixty-four".