90015760 has 40 divisors (see below), whose sum is σ = 211950720. Its totient is φ = 35548032.

The previous prime is 90015743. The next prime is 90015803. The reversal of 90015760 is 6751009.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 802 + ... + 13441.

It is an arithmetic number, because the mean of its divisors is an integer number (5298768).

Almost surely, 2^90015760 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 90015760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105975360).

90015760 is an abundant number, since it is smaller than the sum of its proper divisors (121934960).

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

90015760 is a wasteful number, since it uses less digits than its factorization.

90015760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14335 (or 14329 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 90015760 is about 9487.6635690775. The cubic root of 90015760 is about 448.1666312545.

Adding to 90015760 its reverse (6751009), we get a palindrome (96766769).

The spelling of 90015760 in words is "ninety million, fifteen thousand, seven hundred sixty".