7290 has 28 divisors (see below), whose sum is σ = 19674. Its totient is φ = 1944.

The previous prime is 7283. The next prime is 7297. The reversal of 7290 is 927.

It is an interprime number because it is at equal distance from previous prime (7283) and next prime (7297).

It can be written as a sum of positive squares in only one way, i.e., 6561 + 729 = 81^2 + 27^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an alternating number because its digits alternate between odd and even.

It is a nialpdrome in base 9.

It is a zygodrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (7297) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 1456 + ... + 1460.

It is a practical number, because each smaller number is the sum of distinct divisors of 7290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9837).

7290 is an abundant number, since it is smaller than the sum of its proper divisors (12384).

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

7290 is an equidigital number, since it uses as much as digits as its factorization.

7290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25 (or 10 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 7290 is about 85.3814968245. The cubic root of 7290 is about 19.3899122103.

The spelling of 7290 in words is "seven thousand, two hundred ninety".

Divisors: 1 2 3 5 6 9 10 15 18 27 30 45 54 81 90 135 162 243 270 405 486 729 810 1215 1458 2430 3645 7290

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