7286820 has 24 divisors (see below), whose sum is σ = 20403264. Its totient is φ = 1943136.

The previous prime is 7286813. The next prime is 7286831. The reversal of 7286820 is 286827.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60664 + ... + 60783.

It is an arithmetic number, because the mean of its divisors is an integer number (850136).

Almost surely, 2^7286820 is an apocalyptic number.

It is an amenable number.

7286820 is an abundant number, since it is smaller than the sum of its proper divisors (13116444).

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

7286820 is a wasteful number, since it uses less digits than its factorization.

7286820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121459 (or 121457 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 7286820 is about 2699.4110468767. The cubic root of 7286820 is about 193.8709241657.

The spelling of 7286820 in words is "seven million, two hundred eighty-six thousand, eight hundred twenty".