7928505 has 24 divisors (see below), whose sum is σ = 14800968. Its totient is φ = 3902976.

The previous prime is 7928497. The next prime is 7928507. The reversal of 7928505 is 5058297.

It can be written as a sum of positive squares in 4 ways, for example, as 589824 + 7338681 = 768^2 + 2709^2 .

It is not a de Polignac number, because 7928505 - 2³ = 7928497 is a prime.

It is a super-2 number, since 2×7928505² = 125722383070050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7928505.

It is not an unprimeable number, because it can be changed into a prime (7928507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6192 + ... + 7361.

It is an arithmetic number, because the mean of its divisors is an integer number (616707).

Almost surely, 2^7928505 is an apocalyptic number.

It is an amenable number.

7928505 is a deficient number, since it is larger than the sum of its proper divisors (6872463).

7928505 is a wasteful number, since it uses less digits than its factorization.

7928505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13577 (or 13574 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 7928505 is about 2815.7601105208. The cubic root of 7928505 is about 199.4024246300.

The spelling of 7928505 in words is "seven million, nine hundred twenty-eight thousand, five hundred five".