7289891 has 8 divisors (see below), whose sum is σ = 8352000. Its totient is φ = 6232968.

The previous prime is 7289861. The next prime is 7289911. The reversal of 7289891 is 1989827.

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

It is not a de Polignac number, because 7289891 - 2¹⁴ = 7273507 is a prime.

It is a super-3 number, since 3×7289891³ (a number of 22 digits) contains 333 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7289861) 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, 2450 + ... + 4536.

It is an arithmetic number, because the mean of its divisors is an integer number (1044000).

Almost surely, 2^7289891 is an apocalyptic number.

7289891 is a deficient number, since it is larger than the sum of its proper divisors (1062109).

7289891 is a wasteful number, since it uses less digits than its factorization.

7289891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2593.

The product of its digits is 72576, while the sum is 44.

The square root of 7289891 is about 2699.9798147394. The cubic root of 7289891 is about 193.8981557055.

The spelling of 7289891 in words is "seven million, two hundred eighty-nine thousand, eight hundred ninety-one".