90134240 has 96 divisors (see below), whose sum is σ = 254016000. Its totient is φ = 29551104.

The previous prime is 90134201. The next prime is 90134251. The reversal of 90134240 is 4243109.

It is a Harshad number since it is a multiple of its sum of digits (23).

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, 24011 + ... + 27509.

It is an arithmetic number, because the mean of its divisors is an integer number (2646000).

Almost surely, 2^90134240 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 90134240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127008000).

90134240 is an abundant number, since it is smaller than the sum of its proper divisors (163881760).

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

90134240 is a wasteful number, since it uses less digits than its factorization.

90134240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3544 (or 3536 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 90134240 is about 9493.9054134745. The cubic root of 90134240 is about 448.3631727751.

Adding to 90134240 its reverse (4243109), we get a palindrome (94377349).

The spelling of 90134240 in words is "ninety million, one hundred thirty-four thousand, two hundred forty".