9728793477 has 24 divisors (see below), whose sum is σ = 15144529400. Its totient is φ = 5982657408.

The previous prime is 9728793461. The next prime is 9728793479. The reversal of 9728793477 is 7743978279.

9728793477 is a `hidden beast` number, since 9 + 7 + 287 + 9 + 347 + 7 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 853457796 + 8875335681 = 29214^2 + 94209^2 .

It is not a de Polignac number, because 9728793477 - 2⁴ = 9728793461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9728793479) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138099 + ... + 196287.

Almost surely, 2^9728793477 is an apocalyptic number.

It is an amenable number.

9728793477 is a deficient number, since it is larger than the sum of its proper divisors (5415735923).

9728793477 is a wasteful number, since it uses less digits than its factorization.

9728793477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59637 (or 59634 counting only the distinct ones).

The product of its digits is 37340352, while the sum is 63.

The square root of 9728793477 is about 98634.6464331880. The cubic root of 9728793477 is about 2134.7793578419.

The spelling of 9728793477 in words is "nine billion, seven hundred twenty-eight million, seven hundred ninety-three thousand, four hundred seventy-seven".