7218090 has 96 divisors (see below), whose sum is σ = 21430656. Its totient is φ = 1668480.

The previous prime is 7218083. The next prime is 7218121. The reversal of 7218090 is 908127.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22612 + ... + 22928.

It is an arithmetic number, because the mean of its divisors is an integer number (223236).

Almost surely, 2^7218090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7218090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10715328).

7218090 is an abundant number, since it is smaller than the sum of its proper divisors (14212566).

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

7218090 is a wasteful number, since it uses less digits than its factorization.

7218090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 7218090 is about 2686.6503308023. The cubic root of 7218090 is about 193.2594611417.

The spelling of 7218090 in words is "seven million, two hundred eighteen thousand, ninety".