9090388540 has 48 divisors (see below), whose sum is σ = 19886549760. Its totient is φ = 3486551040.

The previous prime is 9090388523. The next prime is 9090388561. The reversal of 9090388540 is 458830909.

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, 324 + ... + 134836.

It is an arithmetic number, because the mean of its divisors is an integer number (414303120).

Almost surely, 2^9090388540 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 9090388540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9943274880).

9090388540 is an abundant number, since it is smaller than the sum of its proper divisors (10796161220).

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

9090388540 is a wasteful number, since it uses less digits than its factorization.

9090388540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134662 (or 134660 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 9090388540 is about 95343.5290934838. The cubic root of 9090388540 is about 2087.0241861502.

The spelling of 9090388540 in words is "nine billion, ninety million, three hundred eighty-eight thousand, five hundred forty".