8040861 has 6 divisors (see below), whose sum is σ = 11614590. Its totient is φ = 5360568.

The previous prime is 8040853. The next prime is 8040863. The reversal of 8040861 is 1680408.

8040861 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7257636 + 783225 = 2694^2 + 885^2 .

It is not a de Polignac number, because 8040861 - 2³ = 8040853 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8040863) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 446706 + ... + 446723.

It is an arithmetic number, because the mean of its divisors is an integer number (1935765).

Almost surely, 2^8040861 is an apocalyptic number.

It is an amenable number.

8040861 is a deficient number, since it is larger than the sum of its proper divisors (3573729).

8040861 is a wasteful number, since it uses less digits than its factorization.

8040861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893435 (or 893432 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 8040861 is about 2835.6411973309. The cubic root of 8040861 is about 200.3399302432.

The spelling of 8040861 in words is "eight million, forty thousand, eight hundred sixty-one".