9697728442 has 16 divisors (see below), whose sum is σ = 14905499112. Its totient is φ = 4729294080.

The previous prime is 9697728433. The next prime is 9697728463. The reversal of 9697728442 is 2448277969.

It can be written as a sum of positive squares in 4 ways, for example, as 2475958081 + 7221770361 = 49759^2 + 84981^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326308 + ... + 354784.

Almost surely, 2^9697728442 is an apocalyptic number.

9697728442 is a deficient number, since it is larger than the sum of its proper divisors (5207770670).

9697728442 is a wasteful number, since it uses less digits than its factorization.

9697728442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32673.

The product of its digits is 12192768, while the sum is 58.

The square root of 9697728442 is about 98477.0452542114. The cubic root of 9697728442 is about 2132.5047453128.

The spelling of 9697728442 in words is "nine billion, six hundred ninety-seven million, seven hundred twenty-eight thousand, four hundred forty-two".