7728040 has 16 divisors (see below), whose sum is σ = 17388180. Its totient is φ = 3091200.

The previous prime is 7728031. The next prime is 7728043. The reversal of 7728040 is 408277.

It can be written as a sum of positive squares in 2 ways, for example, as 7650756 + 77284 = 2766^2 + 278^2 .

It is not an unprimeable number, because it can be changed into a prime (7728043) 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, 96561 + ... + 96640.

Almost surely, 2^7728040 is an apocalyptic number.

It is an amenable number.

7728040 is an abundant number, since it is smaller than the sum of its proper divisors (9660140).

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

7728040 is a wasteful number, since it uses less digits than its factorization.

7728040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193212 (or 193208 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 7728040 is about 2779.9352510445. The cubic root of 7728040 is about 197.7074890386.

The spelling of 7728040 in words is "seven million, seven hundred twenty-eight thousand, forty".