8404488391 has 8 divisors (see below), whose sum is σ = 9165558080. Its totient is φ = 7659785952.

The previous prime is 8404488383. The next prime is 8404488403. The reversal of 8404488391 is 1938844048.

It is a happy number.

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

It is not a de Polignac number, because 8404488391 - 2³ = 8404488383 is a prime.

It is a super-2 number, since 2×8404488391² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8404488341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4090740 + ... + 4092793.

It is an arithmetic number, because the mean of its divisors is an integer number (1145694760).

Almost surely, 2^8404488391 is an apocalyptic number.

8404488391 is a deficient number, since it is larger than the sum of its proper divisors (761069689).

8404488391 is a wasteful number, since it uses less digits than its factorization.

8404488391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8183625.

The product of its (nonzero) digits is 884736, while the sum is 49.

The square root of 8404488391 is about 91675.9968094157. The cubic root of 8404488391 is about 2033.1547114045.

The spelling of 8404488391 in words is "eight billion, four hundred four million, four hundred eighty-eight thousand, three hundred ninety-one".