7289520 has 80 divisors (see below), whose sum is σ = 25831680. Its totient is φ = 1665792.

The previous prime is 7289519. The next prime is 7289531. The reversal of 7289520 is 259827.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 490 + ... + 3849.

It is an arithmetic number, because the mean of its divisors is an integer number (322896).

Almost surely, 2^7289520 is an apocalyptic number.

7289520 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 7289520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12915840).

7289520 is an abundant number, since it is smaller than the sum of its proper divisors (18542160).

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

7289520 is a wasteful number, since it uses less digits than its factorization.

7289520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4362 (or 4356 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 7289520 is about 2699.9111096479. The cubic root of 7289520 is about 193.8948663360.

The spelling of 7289520 in words is "seven million, two hundred eighty-nine thousand, five hundred twenty".