1381856 has 48 divisors (see below), whose sum is σ = 3225600. Its totient is φ = 570240.

The previous prime is 1381837. The next prime is 1381859. The reversal of 1381856 is 6581831.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381859) 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, 6845 + ... + 7043.

It is an arithmetic number, because the mean of its divisors is an integer number (67200).

2^1381856 is an apocalyptic number.

1381856 is a gapful number since it is divisible by the number (16) 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 1381856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1612800).

1381856 is an abundant number, since it is smaller than the sum of its proper divisors (1843744).

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

1381856 is a wasteful number, since it uses less digits than its factorization.

1381856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247 (or 239 counting only the distinct ones).

The product of its digits is 5760, while the sum is 32.

The square root of 1381856 is about 1175.5237130743. The cubic root of 1381856 is about 111.3835176802.

The spelling of 1381856 in words is "one million, three hundred eighty-one thousand, eight hundred fifty-six".