7681680 has 120 divisors (see below), whose sum is σ = 26462592. Its totient is φ = 1996032.

The previous prime is 7681657. The next prime is 7681691. The reversal of 7681680 is 861867.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33727 + ... + 33953.

Almost surely, 2^7681680 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 7681680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13231296).

7681680 is an abundant number, since it is smaller than the sum of its proper divisors (18780912).

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

7681680 is a wasteful number, since it uses less digits than its factorization.

With its successor (7681681) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (293).

7681680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 7681680 is about 2771.5843844271. The cubic root of 7681680 is about 197.3113511347.

The spelling of 7681680 in words is "seven million, six hundred eighty-one thousand, six hundred eighty".