7128733 has 8 divisors (see below), whose sum is σ = 7312448. Its totient is φ = 6947424.

The previous prime is 7128727. The next prime is 7128739. The reversal of 7128733 is 3378217.

It is an interprime number because it is at equal distance from previous prime (7128727) and next prime (7128739).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7128733 - 2⁵ = 7128701 is a prime.

It is a d-powerful number, because it can be written as 7⁷ + 1 + 2¹³ + 8³ + 7⁸ + 3⁵ + 3¹² .

It is a Duffinian number.

7128733 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7128695 and 7128704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7128739) 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 7 ways as a sum of consecutive naturals, for example, 6385 + ... + 7417.

It is an arithmetic number, because the mean of its divisors is an integer number (914056).

Almost surely, 2^7128733 is an apocalyptic number.

It is an amenable number.

7128733 is a deficient number, since it is larger than the sum of its proper divisors (183715).

7128733 is a wasteful number, since it uses less digits than its factorization.

7128733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203.

The product of its digits is 7056, while the sum is 31.

The square root of 7128733 is about 2669.9687264086. The cubic root of 7128733 is about 192.4586564386.

The spelling of 7128733 in words is "seven million, one hundred twenty-eight thousand, seven hundred thirty-three".