9728957238 has 128 divisors (see below), whose sum is σ = 26371215360. Its totient is φ = 2310664320.

The previous prime is 9728957233. The next prime is 9728957263. The reversal of 9728957238 is 8327598279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9728957233) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 635073 + ... + 650211.

It is an arithmetic number, because the mean of its divisors is an integer number (206025120).

Almost surely, 2^9728957238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9728957238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13185607680).

9728957238 is an abundant number, since it is smaller than the sum of its proper divisors (16642258122).

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

9728957238 is a wasteful number, since it uses less digits than its factorization.

9728957238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15282.

The product of its digits is 15240960, while the sum is 60.

The square root of 9728957238 is about 98635.4765690317. The cubic root of 9728957238 is about 2134.7913357451.

The spelling of 9728957238 in words is "nine billion, seven hundred twenty-eight million, nine hundred fifty-seven thousand, two hundred thirty-eight".