90523280 has 40 divisors (see below), whose sum is σ = 211004352. Its totient is φ = 36116864.

The previous prime is 90523267. The next prime is 90523313. The reversal of 90523280 is 8232509.

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 36149 + ... + 38571.

Almost surely, 2^90523280 is an apocalyptic number.

It is an amenable number.

90523280 is an abundant number, since it is smaller than the sum of its proper divisors (120481072).

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

90523280 is a wasteful number, since it uses less digits than its factorization.

90523280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2903 (or 2897 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 90523280 is about 9514.3722861784. The cubic root of 90523280 is about 449.0073262330.

Adding to 90523280 its reverse (8232509), we get a palindrome (98755789).

The spelling of 90523280 in words is "ninety million, five hundred twenty-three thousand, two hundred eighty".