7728880 has 40 divisors (see below), whose sum is σ = 19030032. Its totient is φ = 2909184.

The previous prime is 7728871. The next prime is 7728907. The reversal of 7728880 is 888277.

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

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

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, 1482 + ... + 4201.

Almost surely, 2^7728880 is an apocalyptic number.

It is an amenable number.

7728880 is an abundant number, since it is smaller than the sum of its proper divisors (11301152).

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

7728880 is a wasteful number, since it uses less digits than its factorization.

7728880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5713 (or 5707 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 40.

The square root of 7728880 is about 2780.0863295948. The cubic root of 7728880 is about 197.7146520568.

The spelling of 7728880 in words is "seven million, seven hundred twenty-eight thousand, eight hundred eighty".