7761648 has 40 divisors (see below), whose sum is σ = 20262096. Its totient is φ = 2560000.

The previous prime is 7761643. The next prime is 7761661. The reversal of 7761648 is 8461677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7761643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4048 + ... + 5648.

Almost surely, 2^7761648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7761648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10131048).

7761648 is an abundant number, since it is smaller than the sum of its proper divisors (12500448).

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

7761648 is a wasteful number, since it uses less digits than its factorization.

7761648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713 (or 1707 counting only the distinct ones).

The product of its digits is 56448, while the sum is 39.

The square root of 7761648 is about 2785.9734384951. The cubic root of 7761648 is about 197.9936739128.

The spelling of 7761648 in words is "seven million, seven hundred sixty-one thousand, six hundred forty-eight".