1881560 has 32 divisors (see below), whose sum is σ = 4484160. Its totient is φ = 708096.

The previous prime is 1881559. The next prime is 1881587. The reversal of 1881560 is 651881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 704 + ... + 2063.

It is an arithmetic number, because the mean of its divisors is an integer number (140130).

2^1881560 is an apocalyptic number.

1881560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1881560 is an abundant number, since it is smaller than the sum of its proper divisors (2602600).

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

1881560 is a wasteful number, since it uses less digits than its factorization.

1881560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2795 (or 2791 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 1881560 is about 1371.6996755850. The cubic root of 1881560 is about 123.4542438965.

The spelling of 1881560 in words is "one million, eight hundred eighty-one thousand, five hundred sixty".