7678720 has 72 divisors (see below), whose sum is σ = 21045024. Its totient is φ = 2629632.

The previous prime is 7678709. The next prime is 7678733. The reversal of 7678720 is 278767.

It is a self number, because there is not a number n which added to its sum of digits gives 7678720.

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, 8532 + ... + 9388.

It is an arithmetic number, because the mean of its divisors is an integer number (292292).

Almost surely, 2^7678720 is an apocalyptic number.

7678720 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7678720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10522512).

7678720 is an abundant number, since it is smaller than the sum of its proper divisors (13366304).

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

7678720 is an equidigital number, since it uses as much as digits as its factorization.

7678720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885 (or 871 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 37.

The square root of 7678720 is about 2771.0503423792. The cubic root of 7678720 is about 197.2860043949.

The spelling of 7678720 in words is "seven million, six hundred seventy-eight thousand, seven hundred twenty".