7912720 has 20 divisors (see below), whose sum is σ = 18397260. Its totient is φ = 3165056.

The previous prime is 7912717. The next prime is 7912733. The reversal of 7912720 is 272197.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5143824 + 2768896 = 2268^2 + 1664^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×7912720² = 125222275596800, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 49375 + ... + 49534.

It is an arithmetic number, because the mean of its divisors is an integer number (919863).

Almost surely, 2^7912720 is an apocalyptic number.

It is an amenable number.

7912720 is an abundant number, since it is smaller than the sum of its proper divisors (10484540).

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

7912720 is a wasteful number, since it uses less digits than its factorization.

7912720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98922 (or 98916 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 7912720 is about 2812.9557408534. The cubic root of 7912720 is about 199.2700054482.

The spelling of 7912720 in words is "seven million, nine hundred twelve thousand, seven hundred twenty".