1896884785 has 4 divisors (see below), whose sum is σ = 2276261748. Its totient is φ = 1517507824.

The previous prime is 1896884749. The next prime is 1896884791. The reversal of 1896884785 is 5874886981.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5874886981 = 69109 ⋅85009.

It can be written as a sum of positive squares in 2 ways, for example, as 263997504 + 1632887281 = 16248^2 + 40409^2 .

It is a cyclic number.

It is not a de Polignac number, because 1896884785 - 2⁹ = 1896884273 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189688474 + ... + 189688483.

It is an arithmetic number, because the mean of its divisors is an integer number (569065437).

Almost surely, 2^1896884785 is an apocalyptic number.

It is an amenable number.

1896884785 is a deficient number, since it is larger than the sum of its proper divisors (379376963).

1896884785 is an equidigital number, since it uses as much as digits as its factorization.

1896884785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379376962.

The product of its digits is 30965760, while the sum is 64.

The square root of 1896884785 is about 43553.2408093818. The cubic root of 1896884785 is about 1237.8850491756.

The spelling of 1896884785 in words is "one billion, eight hundred ninety-six million, eight hundred eighty-four thousand, seven hundred eighty-five".