90518885 has 12 divisors (see below), whose sum is σ = 109526508. Its totient is φ = 71817408.

The previous prime is 90518881. The next prime is 90518893. The reversal of 90518885 is 58881509.

90518885 is nontrivially palindromic in base 16.

It can be written as a sum of positive squares in 2 ways, for example, as 16248961 + 74269924 = 4031^2 + 8618^2 .

It is not a de Polignac number, because 90518885 - 2² = 90518881 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90518881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96137 + ... + 97073.

It is an arithmetic number, because the mean of its divisors is an integer number (9127209).

Almost surely, 2^90518885 is an apocalyptic number.

It is an amenable number.

90518885 is a deficient number, since it is larger than the sum of its proper divisors (19007623).

90518885 is an equidigital number, since it uses as much as digits as its factorization.

90518885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220 (or 1081 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 44.

The square root of 90518885 is about 9514.1413170081. The cubic root of 90518885 is about 449.0000595235. Note that the first 4 decimals are identical.

The spelling of 90518885 in words is "ninety million, five hundred eighteen thousand, eight hundred eighty-five".