1880943985 has 4 divisors (see below), whose sum is σ = 2257132788. Its totient is φ = 1504755184.

The previous prime is 1880943949. The next prime is 1880943991. The reversal of 1880943985 is 5893490881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5893490881 = 47 ⋅125393423.

It can be written as a sum of positive squares in 2 ways, for example, as 1082146816 + 798797169 = 32896^2 + 28263^2 .

It is a cyclic number.

It is not a de Polignac number, because 1880943985 - 2²⁷ = 1746726257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188094394 + ... + 188094403.

It is an arithmetic number, because the mean of its divisors is an integer number (564283197).

Almost surely, 2^1880943985 is an apocalyptic number.

It is an amenable number.

1880943985 is a deficient number, since it is larger than the sum of its proper divisors (376188803).

1880943985 is an equidigital number, since it uses as much as digits as its factorization.

1880943985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376188802.

The product of its (nonzero) digits is 2488320, while the sum is 55.

The square root of 1880943985 is about 43369.8511065002. The cubic root of 1880943985 is about 1234.4076962209.

The spelling of 1880943985 in words is "one billion, eight hundred eighty million, nine hundred forty-three thousand, nine hundred eighty-five".