90027520 has 160 divisors (see below), whose sum is σ = 247484160. Its totient is φ = 31088640.

The previous prime is 90027517. The next prime is 90027551. The reversal of 90027520 is 2572009.

It is a tau number, because it is divible by the number of its divisors (160).

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, 647611 + ... + 647749.

It is an arithmetic number, because the mean of its divisors is an integer number (1546776).

Almost surely, 2^90027520 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 90027520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123742080).

90027520 is an abundant number, since it is smaller than the sum of its proper divisors (157456640).

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

90027520 is a wasteful number, since it uses less digits than its factorization.

90027520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 90027520 is about 9488.2833009981. The cubic root of 90027520 is about 448.1861471336.

Adding to 90027520 its reverse (2572009), we get a palindrome (92599529).

The spelling of 90027520 in words is "ninety million, twenty-seven thousand, five hundred twenty".