91050240 has 144 divisors (see below), whose sum is σ = 294630336. Its totient is φ = 23961600.

The previous prime is 91050209. The next prime is 91050241. The reversal of 91050240 is 4205019.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91050241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 502950 + ... + 503130.

It is an arithmetic number, because the mean of its divisors is an integer number (2046044).

Almost surely, 2^91050240 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 91050240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147315168).

91050240 is an abundant number, since it is smaller than the sum of its proper divisors (203580096).

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

91050240 is a wasteful number, since it uses less digits than its factorization.

91050240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 91050240 is about 9542.0249423275. The cubic root of 91050240 is about 449.8769046025.

Adding to 91050240 its reverse (4205019), we get a palindrome (95255259).

The spelling of 91050240 in words is "ninety-one million, fifty thousand, two hundred forty".