90236544 has 128 divisors (see below), whose sum is σ = 265265280. Its totient is φ = 27033600.

The previous prime is 90236539. The next prime is 90236551. The reversal of 90236544 is 44563209.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149844 + ... + 150444.

It is an arithmetic number, because the mean of its divisors is an integer number (2072385).

Almost surely, 2^90236544 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 90236544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132632640).

90236544 is an abundant number, since it is smaller than the sum of its proper divisors (175028736).

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

90236544 is a wasteful number, since it uses less digits than its factorization.

90236544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658 (or 646 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 90236544 is about 9499.2917630737. The cubic root of 90236544 is about 448.5327420855.

The spelling of 90236544 in words is "ninety million, two hundred thirty-six thousand, five hundred forty-four".