7918720 has 32 divisors (see below), whose sum is σ = 18932220. Its totient is φ = 3167232.

The previous prime is 7918717. The next prime is 7918721. The reversal of 7918720 is 278197.

It can be written as a sum of positive squares in 2 ways, for example, as 7884864 + 33856 = 2808^2 + 184^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×7918720² = 125412252876800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7918721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5547 + ... + 6826.

Almost surely, 2^7918720 is an apocalyptic number.

It is an amenable number.

7918720 is an abundant number, since it is smaller than the sum of its proper divisors (11013500).

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

7918720 is a wasteful number, since it uses less digits than its factorization.

7918720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12392 (or 12380 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 7918720 is about 2814.0220326074. The cubic root of 7918720 is about 199.3203597283.

The spelling of 7918720 in words is "seven million, nine hundred eighteen thousand, seven hundred twenty".