1881616 has 20 divisors (see below), whose sum is σ = 3977424. Its totient is φ = 855200.

The previous prime is 1881601. The next prime is 1881617. The reversal of 1881616 is 6161881.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1881617) 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, 5170 + ... + 5521.

2^1881616 is an apocalyptic number.

1881616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1881616 is an abundant number, since it is smaller than the sum of its proper divisors (2095808).

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

1881616 is a wasteful number, since it uses less digits than its factorization.

1881616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10710 (or 10704 counting only the distinct ones).

The product of its digits is 2304, while the sum is 31.

The square root of 1881616 is about 1371.7200880646. The cubic root of 1881616 is about 123.4554686548.

The spelling of 1881616 in words is "one million, eight hundred eighty-one thousand, six hundred sixteen".