1881396 has 36 divisors (see below), whose sum is σ = 5189184. Its totient is φ = 570000.

The previous prime is 1881391. The next prime is 1881401. The reversal of 1881396 is 6931881.

It is an interprime number because it is at equal distance from previous prime (1881391) and next prime (1881401).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1881396.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881391) by changing a digit.

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, 1980 + ... + 2771.

It is an arithmetic number, because the mean of its divisors is an integer number (144144).

2^1881396 is an apocalyptic number.

It is an amenable number.

1881396 is an abundant number, since it is smaller than the sum of its proper divisors (3307788).

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

1881396 is a wasteful number, since it uses less digits than its factorization.

1881396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4772 (or 4767 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 1881396 is about 1371.6398944329. The cubic root of 1881396 is about 123.4506569643.

The spelling of 1881396 in words is "one million, eight hundred eighty-one thousand, three hundred ninety-six".