9050721240 has 128 divisors (see below), whose sum is σ = 29908569600. Its totient is φ = 2172779520.

The previous prime is 9050721209. The next prime is 9050721299. The reversal of 9050721240 is 421270509.

It is a super-3 number, since 3×9050721240³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 9050721198 and 9050721207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 102676 + ... + 169244.

It is an arithmetic number, because the mean of its divisors is an integer number (233660700).

Almost surely, 2^9050721240 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 9050721240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14954284800).

9050721240 is an abundant number, since it is smaller than the sum of its proper divisors (20857848360).

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

9050721240 is a wasteful number, since it uses less digits than its factorization.

9050721240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66697 (or 66693 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 9050721240 is about 95135.2786299593. The cubic root of 9050721240 is about 2083.9840768355.

Adding to 9050721240 its reverse (421270509), we get a palindrome (9471991749).

The spelling of 9050721240 in words is "nine billion, fifty million, seven hundred twenty-one thousand, two hundred forty".