7288381 has 8 divisors (see below), whose sum is σ = 7721280. Its totient is φ = 6860448.

The previous prime is 7288361. The next prime is 7288397. The reversal of 7288381 is 1838827.

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 7288381 - 2⁵ = 7288349 is a prime.

It is a super-2 number, since 2×7288381² = 106240995202322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

7288381 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7288381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7288301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2025 + ... + 4321.

It is an arithmetic number, because the mean of its divisors is an integer number (965160).

Almost surely, 2^7288381 is an apocalyptic number.

It is an amenable number.

7288381 is a deficient number, since it is larger than the sum of its proper divisors (432899).

7288381 is a wasteful number, since it uses less digits than its factorization.

7288381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2483.

The product of its digits is 21504, while the sum is 37.

The square root of 7288381 is about 2699.7001685372. The cubic root of 7288381 is about 193.8847670082.

The spelling of 7288381 in words is "seven million, two hundred eighty-eight thousand, three hundred eighty-one".