8404728531 has 8 divisors (see below), whose sum is σ = 11213991360. Its totient is φ = 5599309032.

The previous prime is 8404728511. The next prime is 8404728533. The reversal of 8404728531 is 1358274048.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8404728531 - 2²³ = 8396339923 is a prime.

It is a super-2 number, since 2×8404728531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8404728533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 955725 + ... + 964478.

It is an arithmetic number, because the mean of its divisors is an integer number (1401748920).

Almost surely, 2^8404728531 is an apocalyptic number.

8404728531 is a deficient number, since it is larger than the sum of its proper divisors (2809262829).

8404728531 is a wasteful number, since it uses less digits than its factorization.

8404728531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921665.

The product of its (nonzero) digits is 215040, while the sum is 42.

The square root of 8404728531 is about 91677.3065212978. The cubic root of 8404728531 is about 2033.1740755466.

The spelling of 8404728531 in words is "eight billion, four hundred four million, seven hundred twenty-eight thousand, five hundred thirty-one".