8478431 has 8 divisors (see below), whose sum is σ = 9353904. Its totient is φ = 7634880.

The previous prime is 8478391. The next prime is 8478433. The reversal of 8478431 is 1348748.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8478431 is a prime.

It is a super-2 number, since 2×8478431² = 143767584443522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8478391 and 8478400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8478433) 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, 7421 + ... + 8486.

It is an arithmetic number, because the mean of its divisors is an integer number (1169238).

Almost surely, 2^8478431 is an apocalyptic number.

8478431 is a deficient number, since it is larger than the sum of its proper divisors (875473).

8478431 is a wasteful number, since it uses less digits than its factorization.

8478431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15961.

The product of its digits is 21504, while the sum is 35.

The square root of 8478431 is about 2911.7745448437. The cubic root of 8478431 is about 203.9099868807.

The spelling of 8478431 in words is "eight million, four hundred seventy-eight thousand, four hundred thirty-one".