7776880 has 40 divisors (see below), whose sum is σ = 18530064. Its totient is φ = 3033600.

The previous prime is 7776799. The next prime is 7776889. The reversal of 7776880 is 886777.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7776889) 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, 2095 + ... + 4465.

Almost surely, 2^7776880 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 7776880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9265032).

7776880 is an abundant number, since it is smaller than the sum of its proper divisors (10753184).

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

7776880 is a wasteful number, since it uses less digits than its factorization.

7776880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2425 (or 2419 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 43.

The square root of 7776880 is about 2788.7057930158. The cubic root of 7776880 is about 198.1231081497.

The spelling of 7776880 in words is "seven million, seven hundred seventy-six thousand, eight hundred eighty".