1881386885 has 32 divisors (see below), whose sum is σ = 2668038912. Its totient is φ = 1246763520.

The previous prime is 1881386873. The next prime is 1881386929. The reversal of 1881386885 is 5886831881.

It is a happy number.

It is not a de Polignac number, because 1881386885 - 2²⁶ = 1814278021 is a prime.

It is a super-2 number, since 2×1881386885² = 7079233222100006450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1881386885.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147419 + ... + 159671.

It is an arithmetic number, because the mean of its divisors is an integer number (83376216).

Almost surely, 2^1881386885 is an apocalyptic number.

It is an amenable number.

1881386885 is a deficient number, since it is larger than the sum of its proper divisors (786652027).

1881386885 is a wasteful number, since it uses less digits than its factorization.

1881386885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12413.

The product of its digits is 2949120, while the sum is 56.

The square root of 1881386885 is about 43374.9568875866. The cubic root of 1881386885 is about 1234.5045759911.

The spelling of 1881386885 in words is "one billion, eight hundred eighty-one million, three hundred eighty-six thousand, eight hundred eighty-five".