2478678 has 8 divisors (see below), whose sum is σ = 4957368. Its totient is φ = 826224.

The previous prime is 2478677. The next prime is 2478691. The reversal of 2478678 is 8768742.

2478678 is digitally balanced in base 2, 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.

2478678 is an admirable number.

It is a super-2 number, since 2×2478678² = 12287689255368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2478673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206551 + ... + 206562.

It is an arithmetic number, because the mean of its divisors is an integer number (619671).

2^2478678 is an apocalyptic number.

2478678 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2478678 is a wasteful number, since it uses less digits than its factorization.

2478678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413118.

The product of its digits is 150528, while the sum is 42.

The square root of 2478678 is about 1574.3817834312. The cubic root of 2478678 is about 135.3339332536. Note that the first 3 decimals are identical.

Subtracting 2478678 from its reverse (8768742), we obtain a square (6290064 = 2508²).

The spelling of 2478678 in words is "two million, four hundred seventy-eight thousand, six hundred seventy-eight".