9728057240 has 32 divisors (see below), whose sum is σ = 23877959760. Its totient is φ = 3537475200.

The previous prime is 9728057189. The next prime is 9728057257. The reversal of 9728057240 is 427508279.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 9728057191 and 9728057200.

It is a congruent number.

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, 11054171 + ... + 11055050.

Almost surely, 2^9728057240 is an apocalyptic number.

It is an amenable number.

9728057240 is an abundant number, since it is smaller than the sum of its proper divisors (14149902520).

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

9728057240 is a wasteful number, since it uses less digits than its factorization.

9728057240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22109243 (or 22109239 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 9728057240 is about 98630.9142206438. The cubic root of 9728057240 is about 2134.7255059022.

The spelling of 9728057240 in words is "nine billion, seven hundred twenty-eight million, fifty-seven thousand, two hundred forty".