90521536 has 112 divisors (see below), whose sum is σ = 217440256. Its totient is φ = 36578304.

The previous prime is 90521507. The next prime is 90521551. The reversal of 90521536 is 63512509.

It is a tau number, because it is divible by the number of its divisors (112).

It is a junction number, because it is equal to n+sod(n) for n = 90521498 and 90521507.

It is a congruent number.

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, 712705 + ... + 712831.

Almost surely, 2^90521536 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 90521536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108720128).

90521536 is an abundant number, since it is smaller than the sum of its proper divisors (126918720).

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

90521536 is a wasteful number, since it uses less digits than its factorization.

90521536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 90521536 is about 9514.2806349193. The cubic root of 90521536 is about 449.0044427250.

The spelling of 90521536 in words is "ninety million, five hundred twenty-one thousand, five hundred thirty-six".