7881648 has 20 divisors (see below), whose sum is σ = 20361048. Its totient is φ = 2627200.

The previous prime is 7881647. The next prime is 7881689. The reversal of 7881648 is 8461887.

It is not an unprimeable number, because it can be changed into a prime (7881647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82053 + ... + 82148.

Almost surely, 2^7881648 is an apocalyptic number.

It is an amenable number.

7881648 is an abundant number, since it is smaller than the sum of its proper divisors (12479400).

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

7881648 is a wasteful number, since it uses less digits than its factorization.

7881648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164212 (or 164206 counting only the distinct ones).

The product of its digits is 86016, while the sum is 42.

The square root of 7881648 is about 2807.4272920238. The cubic root of 7881648 is about 199.0088293516.

The spelling of 7881648 in words is "seven million, eight hundred eighty-one thousand, six hundred forty-eight".