1881380 has 24 divisors (see below), whose sum is σ = 4159680. Its totient is φ = 712800.

The previous prime is 1881349. The next prime is 1881389. The reversal of 1881380 is 831881.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1881389) 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, 2096 + ... + 2855.

It is an arithmetic number, because the mean of its divisors is an integer number (173320).

2^1881380 is an apocalyptic number.

1881380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1881380 is an abundant number, since it is smaller than the sum of its proper divisors (2278300).

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

1881380 is a wasteful number, since it uses less digits than its factorization.

1881380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4979 (or 4977 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 1881380 is about 1371.6340619859. The cubic root of 1881380 is about 123.4503070085.

The spelling of 1881380 in words is "one million, eight hundred eighty-one thousand, three hundred eighty".