90327720 has 128 divisors (see below), whose sum is σ = 311869440. Its totient is φ = 20501760.

The previous prime is 90327719. The next prime is 90327733. The reversal of 90327720 is 2772309.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 160159 + ... + 160721.

It is an arithmetic number, because the mean of its divisors is an integer number (2436480).

Almost surely, 2^90327720 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 90327720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155934720).

90327720 is an abundant number, since it is smaller than the sum of its proper divisors (221541720).

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

90327720 is a wasteful number, since it uses less digits than its factorization.

90327720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775 (or 771 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 30.

The square root of 90327720 is about 9504.0896460419. The cubic root of 90327720 is about 448.6837587117.

The spelling of 90327720 in words is "ninety million, three hundred twenty-seven thousand, seven hundred twenty".