2478478 has 4 divisors (see below), whose sum is σ = 3717720. Its totient is φ = 1239238.

The previous prime is 2478473. The next prime is 2478479. The reversal of 2478478 is 8748742.

It is a happy number.

2478478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×2478478² = 12285706392968, which contains 22 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2478478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2478473) 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 as a sum of consecutive naturals, namely, 619618 + ... + 619621.

It is an arithmetic number, because the mean of its divisors is an integer number (929430).

2^2478478 is an apocalyptic number.

2478478 is a deficient number, since it is larger than the sum of its proper divisors (1239242).

2478478 is a wasteful number, since it uses less digits than its factorization.

2478478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239241.

The product of its digits is 100352, while the sum is 40.

The square root of 2478478 is about 1574.3182651548. The cubic root of 2478478 is about 135.3302932064.

The spelling of 2478478 in words is "two million, four hundred seventy-eight thousand, four hundred seventy-eight".