90510440 has 16 divisors (see below), whose sum is σ = 203648580. Its totient is φ = 36204160.

The previous prime is 90510383. The next prime is 90510461. The reversal of 90510440 is 4401509.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 88698724 + 1811716 = 9418^2 + 1346^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1131341 + ... + 1131420.

Almost surely, 2^90510440 is an apocalyptic number.

It is an amenable number.

90510440 is an abundant number, since it is smaller than the sum of its proper divisors (113138140).

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

90510440 is a wasteful number, since it uses less digits than its factorization.

90510440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2262772 (or 2262768 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 90510440 is about 9513.6974936141. The cubic root of 90510440 is about 448.9860958686.

Adding to 90510440 its reverse (4401509), we get a palindrome (94911949).

The spelling of 90510440 in words is "ninety million, five hundred ten thousand, four hundred forty".