7128650 has 12 divisors (see below), whose sum is σ = 13259382. Its totient is φ = 2851440.

The previous prime is 7128647. The next prime is 7128673. The reversal of 7128650 is 568217.

It can be written as a sum of positive squares in 3 ways, for example, as 4635409 + 2493241 = 2153^2 + 1579^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

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 5 ways as a sum of consecutive naturals, for example, 71237 + ... + 71336.

Almost surely, 2^7128650 is an apocalyptic number.

7128650 is a deficient number, since it is larger than the sum of its proper divisors (6130732).

7128650 is a wasteful number, since it uses less digits than its factorization.

7128650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142585 (or 142580 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 7128650 is about 2669.9531831101. The cubic root of 7128650 is about 192.4579095022.

The spelling of 7128650 in words is "seven million, one hundred twenty-eight thousand, six hundred fifty".