90440208 has 30 divisors (see below), whose sum is σ = 253107374. Its totient is φ = 30146688.

The previous prime is 90440201. The next prime is 90440213. The reversal of 90440208 is 80204409.

It can be written as a sum of positive squares in only one way, i.e., 69755904 + 20684304 = 8352^2 + 4548^2 .

It is not an unprimeable number, because it can be changed into a prime (90440201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 313885 + ... + 314172.

Almost surely, 2^90440208 is an apocalyptic number.

It is an amenable number.

90440208 is an abundant number, since it is smaller than the sum of its proper divisors (162667166).

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

90440208 is a wasteful number, since it uses less digits than its factorization.

90440208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628071 (or 628062 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 90440208 is about 9510.0056782317. The cubic root of 90440208 is about 448.8699348632.

The spelling of 90440208 in words is "ninety million, four hundred forty thousand, two hundred eight".