90722216 has 32 divisors (see below), whose sum is σ = 184615200. Its totient is φ = 41545920.

The previous prime is 90722147. The next prime is 90722227. The reversal of 90722216 is 61222709.

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 7 ways as a sum of consecutive naturals, for example, 10295 + ... + 16953.

It is an arithmetic number, because the mean of its divisors is an integer number (5769225).

Almost surely, 2^90722216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90722216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92307600).

90722216 is an abundant number, since it is smaller than the sum of its proper divisors (93892984).

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

90722216 is a wasteful number, since it uses less digits than its factorization.

90722216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6809 (or 6805 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 90722216 is about 9524.8210481877. The cubic root of 90722216 is about 449.3360017882.

The spelling of 90722216 in words is "ninety million, seven hundred twenty-two thousand, two hundred sixteen".