8061840 has 60 divisors (see below), whose sum is σ = 27076764. Its totient is φ = 2149632.

The previous prime is 8061839. The next prime is 8061841. The reversal of 8061840 is 481608.

8061840 is a `hidden beast` number, since 8 + 0 + 618 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (8061839) and next prime (8061841).

It can be written as a sum of positive squares in 2 ways, for example, as 2359296 + 5702544 = 1536^2 + 2388^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a nialpdrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (8061841) 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, 4879 + ... + 6318.

Almost surely, 2^8061840 is an apocalyptic number.

8061840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8061840 is an abundant number, since it is smaller than the sum of its proper divisors (19014924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8061840 is a wasteful number, since it uses less digits than its factorization.

8061840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11216 (or 11207 counting only the distinct ones).

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

The square root of 8061840 is about 2839.3379510020. The cubic root of 8061840 is about 200.5140111642.

The spelling of 8061840 in words is "eight million, sixty-one thousand, eight hundred forty".