9729287442 has 96 divisors (see below), whose sum is σ = 26331761664. Its totient is φ = 2531865600.

The previous prime is 9729287441. The next prime is 9729287467. The reversal of 9729287442 is 2447829279.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (9729287441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6859 + ... + 139662.

It is an arithmetic number, because the mean of its divisors is an integer number (274289184).

Almost surely, 2^9729287442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9729287442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13165880832).

9729287442 is an abundant number, since it is smaller than the sum of its proper divisors (16602474222).

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

9729287442 is a wasteful number, since it uses less digits than its factorization.

9729287442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146584 (or 146581 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The square root of 9729287442 is about 98637.1504150439. The cubic root of 9729287442 is about 2134.8154873113.

The spelling of 9729287442 in words is "nine billion, seven hundred twenty-nine million, two hundred eighty-seven thousand, four hundred forty-two".