9538634490 has 384 divisors, whose sum is σ = 30152908800. Its totient is φ = 1927981440.

The previous prime is 9538634437. The next prime is 9538634503. The reversal of 9538634490 is 944368359.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 58519149 + ... + 58519311.

It is an arithmetic number, because the mean of its divisors is an integer number (78523200).

Almost surely, 2^9538634490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9538634490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15076454400).

9538634490 is an abundant number, since it is smaller than the sum of its proper divisors (20614274310).

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

9538634490 is a wasteful number, since it uses less digits than its factorization.

9538634490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 51.

The square root of 9538634490 is about 97665.9331087355. The cubic root of 9538634490 is about 2120.7789419866.

The spelling of 9538634490 in words is "nine billion, five hundred thirty-eight million, six hundred thirty-four thousand, four hundred ninety".