8541640 has 32 divisors (see below), whose sum is σ = 20232000. Its totient is φ = 3236544.

The previous prime is 8541587. The next prime is 8541679. The reversal of 8541640 is 461458.

It is a super-2 number, since 2×8541640² = 145919227779200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8541599 and 8541608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4860 + ... + 6379.

It is an arithmetic number, because the mean of its divisors is an integer number (632250).

Almost surely, 2^8541640 is an apocalyptic number.

It is an amenable number.

8541640 is an abundant number, since it is smaller than the sum of its proper divisors (11690360).

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

8541640 is a wasteful number, since it uses less digits than its factorization.

8541640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11269 (or 11265 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 8541640 is about 2922.6084239939. The cubic root of 8541640 is about 204.4154675203.

The spelling of 8541640 in words is "eight million, five hundred forty-one thousand, six hundred forty".