1881280 has 28 divisors (see below), whose sum is σ = 4480560. Its totient is φ = 752384.

The previous prime is 1881277. The next prime is 1881289. The reversal of 1881280 is 821881.

It is a congruent number.

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, 2620 + ... + 3259.

It is an arithmetic number, because the mean of its divisors is an integer number (160020).

2^1881280 is an apocalyptic number.

1881280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1881280 is an abundant number, since it is smaller than the sum of its proper divisors (2599280).

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

1881280 is an equidigital number, since it uses as much as digits as its factorization.

1881280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5896 (or 5886 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 28.

The square root of 1881280 is about 1371.5976086302. The cubic root of 1881280 is about 123.4481197401.

The spelling of 1881280 in words is "one million, eight hundred eighty-one thousand, two hundred eighty".