7128660 has 96 divisors (see below), whose sum is σ = 24901632. Its totient is φ = 1480320.

The previous prime is 7128647. The next prime is 7128673. The reversal of 7128660 is 668217.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7128647) and next prime (7128673).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent 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 31 ways as a sum of consecutive naturals, for example, 3849 + ... + 5391.

It is an arithmetic number, because the mean of its divisors is an integer number (259392).

Almost surely, 2^7128660 is an apocalyptic number.

7128660 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7128660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12450816).

7128660 is an abundant number, since it is smaller than the sum of its proper divisors (17772972).

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

7128660 is a wasteful number, since it uses less digits than its factorization.

7128660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573 (or 1571 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 7128660 is about 2669.9550558015. The cubic root of 7128660 is about 192.4579994948.

The spelling of 7128660 in words is "seven million, one hundred twenty-eight thousand, six hundred sixty".