7878471 has 8 divisors (see below), whose sum is σ = 10585344. Its totient is φ = 5211960.

The previous prime is 7878461. The next prime is 7878487. The reversal of 7878471 is 1748787.

7878471 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 7878471 - 2⁵ = 7878439 is a prime.

It is a super-3 number, since 3×7878471³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7878421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9631 + ... + 10416.

It is an arithmetic number, because the mean of its divisors is an integer number (1323168).

Almost surely, 2^7878471 is an apocalyptic number.

7878471 is a deficient number, since it is larger than the sum of its proper divisors (2706873).

7878471 is a wasteful number, since it uses less digits than its factorization.

7878471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20181.

The product of its digits is 87808, while the sum is 42.

The square root of 7878471 is about 2806.8614144628. The cubic root of 7878471 is about 198.9820863819.

The spelling of 7878471 in words is "seven million, eight hundred seventy-eight thousand, four hundred seventy-one".