1889066881 has 16 divisors (see below), whose sum is σ = 2063174400. Its totient is φ = 1719139968.

The previous prime is 1889066831. The next prime is 1889066891. The reversal of 1889066881 is 1886609881.

It is not a de Polignac number, because 1889066881 - 2⁹ = 1889066369 is a prime.

It is a super-2 number, since 2×1889066881² = 7137147361782136322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1889066831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1323090 + ... + 1324516.

It is an arithmetic number, because the mean of its divisors is an integer number (128948400).

Almost surely, 2^1889066881 is an apocalyptic number.

It is an amenable number.

1889066881 is a deficient number, since it is larger than the sum of its proper divisors (174107519).

1889066881 is a wasteful number, since it uses less digits than its factorization.

1889066881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2808.

The product of its (nonzero) digits is 1327104, while the sum is 55.

The square root of 1889066881 is about 43463.3970255432. The cubic root of 1889066881 is about 1236.1820829227.

The spelling of 1889066881 in words is "one billion, eight hundred eighty-nine million, sixty-six thousand, eight hundred eighty-one".