1881386884 has 24 divisors (see below), whose sum is σ = 3547231128. Its totient is φ = 867955200.

The previous prime is 1881386873. The next prime is 1881386929. The reversal of 1881386884 is 4886831881.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 94633984 + 1786752900 = 9728^2 + 42270^2 .

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, 139194 + ... + 152110.

It is an arithmetic number, because the mean of its divisors is an integer number (147801297).

Almost surely, 2^1881386884 is an apocalyptic number.

It is an amenable number.

1881386884 is a deficient number, since it is larger than the sum of its proper divisors (1665844244).

1881386884 is a wasteful number, since it uses less digits than its factorization.

1881386884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15735 (or 15733 counting only the distinct ones).

The product of its digits is 2359296, while the sum is 55.

The square root of 1881386884 is about 43374.9568760593. The cubic root of 1881386884 is about 1234.5045757724.

The spelling of 1881386884 in words is "one billion, eight hundred eighty-one million, three hundred eighty-six thousand, eight hundred eighty-four".