90036090 has 96 divisors (see below), whose sum is σ = 248806080. Its totient is φ = 23168160.

The previous prime is 90036077. The next prime is 90036091. The reversal of 90036090 is 9063009.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (90036091) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 259297 + ... + 259643.

It is an arithmetic number, because the mean of its divisors is an integer number (2591730).

Almost surely, 2^90036090 is an apocalyptic number.

90036090 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 90036090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124403040).

90036090 is an abundant number, since it is smaller than the sum of its proper divisors (158769990).

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

90036090 is a wasteful number, since it uses less digits than its factorization.

90036090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425 (or 388 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 90036090 is about 9488.7348998694. The cubic root of 90036090 is about 448.2003680941.

Adding to 90036090 its reverse (9063009), we get a palindrome (99099099).

The spelling of 90036090 in words is "ninety million, thirty-six thousand, ninety".