90518512 has 90 divisors (see below), whose sum is σ = 214495944. Its totient is φ = 36247680.

The previous prime is 90518479. The next prime is 90518513. The reversal of 90518512 is 21581509.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90518513) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2919937 + ... + 2919967.

Almost surely, 2^90518512 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 90518512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107247972).

90518512 is an abundant number, since it is smaller than the sum of its proper divisors (123977432).

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

90518512 is a wasteful number, since it uses less digits than its factorization.

90518512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 90518512 is about 9514.1217145883. The cubic root of 90518512 is about 448.9994427931. Note that the first 3 decimals are identical.

The spelling of 90518512 in words is "ninety million, five hundred eighteen thousand, five hundred twelve".