7128667 has 36 divisors (see below), whose sum is σ = 9729216. Its totient is φ = 5171040.

The previous prime is 7128647. The next prime is 7128673. The reversal of 7128667 is 7668217.

It is a happy number.

It is not a de Polignac number, because 7128667 - 2¹⁵ = 7095899 is a prime.

Its product of digits (28224) is a multiple of the sum of its prime factors (96).

It is not an unprimeable number, because it can be changed into a prime (7128617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 229942 + ... + 229972.

It is an arithmetic number, because the mean of its divisors is an integer number (270256).

Almost surely, 2^7128667 is an apocalyptic number.

7128667 is the 1542-nd hex number.

7128667 is a deficient number, since it is larger than the sum of its proper divisors (2600549).

7128667 is a wasteful number, since it uses less digits than its factorization.

7128667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 70 counting only the distinct ones).

The product of its digits is 28224, while the sum is 37.

The square root of 7128667 is about 2669.9563666847. The cubic root of 7128667 is about 192.4580624896.

The spelling of 7128667 in words is "seven million, one hundred twenty-eight thousand, six hundred sixty-seven".