90131080 has 96 divisors (see below), whose sum is σ = 223992000. Its totient is φ = 32617728.

The previous prime is 90131071. The next prime is 90131081. The reversal of 90131080 is 8013109.

It is a super-2 number, since 2×90131080² = 16247223163932800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90131081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 452821 + ... + 453019.

It is an arithmetic number, because the mean of its divisors is an integer number (2333250).

Almost surely, 2^90131080 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 90131080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111996000).

90131080 is an abundant number, since it is smaller than the sum of its proper divisors (133860920).

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

90131080 is a wasteful number, since it uses less digits than its factorization.

90131080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 90131080 is about 9493.7389894604. The cubic root of 90131080 is about 448.3579330194.

Adding to 90131080 its reverse (8013109), we get a palindrome (98144189).

The spelling of 90131080 in words is "ninety million, one hundred thirty-one thousand, eighty".