90665224 has 32 divisors (see below), whose sum is σ = 184063320. Its totient is φ = 41619456.

The previous prime is 90665213. The next prime is 90665249. The reversal of 90665224 is 42256609.

It can be written as a sum of positive squares in 4 ways, for example, as 19802500 + 70862724 = 4450^2 + 8418^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 90665224.

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, 17814 + ... + 22330.

Almost surely, 2^90665224 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 90665224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92031660).

90665224 is an abundant number, since it is smaller than the sum of its proper divisors (93398096).

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

90665224 is a wasteful number, since it uses less digits than its factorization.

90665224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4729 (or 4725 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 90665224 is about 9521.8288159366. The cubic root of 90665224 is about 449.2418906180.

The spelling of 90665224 in words is "ninety million, six hundred sixty-five thousand, two hundred twenty-four".