1881585852 has 12 divisors (see below), whose sum is σ = 4390367016. Its totient is φ = 627195280.

The previous prime is 1881585851. The next prime is 1881585869. The reversal of 1881585852 is 2585851881.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1881585795 and 1881585804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881585851) 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, 78399399 + ... + 78399422.

It is an arithmetic number, because the mean of its divisors is an integer number (365863918).

Almost surely, 2^1881585852 is an apocalyptic number.

1881585852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1881585852 is an abundant number, since it is smaller than the sum of its proper divisors (2508781164).

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

1881585852 is a wasteful number, since it uses less digits than its factorization.

1881585852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156798828 (or 156798826 counting only the distinct ones).

The product of its digits is 1024000, while the sum is 51.

The square root of 1881585852 is about 43377.2503969535. The cubic root of 1881585852 is about 1234.5480930043.

The spelling of 1881585852 in words is "one billion, eight hundred eighty-one million, five hundred eighty-five thousand, eight hundred fifty-two".