8481640 has 32 divisors (see below), whose sum is σ = 20207880. Its totient is φ = 3192832.

The previous prime is 8481637. The next prime is 8481661. The reversal of 8481640 is 461848.

It can be written as a sum of positive squares in 4 ways, for example, as 8099716 + 381924 = 2846^2 + 618^2 .

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, 5557 + ... + 6916.

Almost surely, 2^8481640 is an apocalyptic number.

It is an amenable number.

8481640 is an abundant number, since it is smaller than the sum of its proper divisors (11726240).

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

8481640 is a wasteful number, since it uses less digits than its factorization.

8481640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12501 (or 12497 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 8481640 is about 2912.3255312550. The cubic root of 8481640 is about 203.9357095886.

The spelling of 8481640 in words is "eight million, four hundred eighty-one thousand, six hundred forty".