90681222 has 8 divisors (see below), whose sum is σ = 181362456. Its totient is φ = 30227072.

The previous prime is 90681193. The next prime is 90681233. The reversal of 90681222 is 22218609.

It is a sphenic number, since it is the product of 3 distinct primes.

90681222 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 90681222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7556763 + ... + 7556774.

It is an arithmetic number, because the mean of its divisors is an integer number (22670307).

Almost surely, 2^90681222 is an apocalyptic number.

90681222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

90681222 is a wasteful number, since it uses less digits than its factorization.

90681222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15113542.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 90681222 is about 9522.6688485949. The cubic root of 90681222 is about 449.2683121748.

It can be divided in two parts, 906 and 81222, that added together give a palindrome (82128).

The spelling of 90681222 in words is "ninety million, six hundred eighty-one thousand, two hundred twenty-two".