8781849 has 12 divisors (see below), whose sum is σ = 12811812. Its totient is φ = 5796000.

The previous prime is 8781797. The next prime is 8781853. The reversal of 8781849 is 9481878.

It can be written as a sum of positive squares in 2 ways, for example, as 3583449 + 5198400 = 1893^2 + 2280^2 .

It is not a de Polignac number, because 8781849 - 2⁸ = 8781593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8781859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3922 + ... + 5739.

It is an arithmetic number, because the mean of its divisors is an integer number (1067651).

Almost surely, 2^8781849 is an apocalyptic number.

It is an amenable number.

8781849 is a deficient number, since it is larger than the sum of its proper divisors (4029963).

8781849 is a wasteful number, since it uses less digits than its factorization.

8781849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9768 (or 9765 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 8781849 is about 2963.4184652188. The cubic root of 8781849 is about 206.3139790496.

The spelling of 8781849 in words is "eight million, seven hundred eighty-one thousand, eight hundred forty-nine".