1881284 has 12 divisors (see below), whose sum is σ = 3317244. Its totient is φ = 933504.

The previous prime is 1881277. The next prime is 1881289. The reversal of 1881284 is 4821881.

It can be written as a sum of positive squares in 2 ways, for example, as 861184 + 1020100 = 928^2 + 1010^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1881284.

It is not an unprimeable number, because it can be changed into a prime (1881289) 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, 1169 + ... + 2264.

It is an arithmetic number, because the mean of its divisors is an integer number (276437).

2^1881284 is an apocalyptic number.

It is an amenable number.

1881284 is a deficient number, since it is larger than the sum of its proper divisors (1435960).

1881284 is a wasteful number, since it uses less digits than its factorization.

1881284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3574 (or 3572 counting only the distinct ones).

The product of its digits is 4096, while the sum is 32.

The square root of 1881284 is about 1371.5990667830. The cubic root of 1881284 is about 123.4482072323.

The spelling of 1881284 in words is "one million, eight hundred eighty-one thousand, two hundred eighty-four".