2478478393 has 4 divisors (see below), whose sum is σ = 2478833280. Its totient is φ = 2478123508.

The previous prime is 2478478361. The next prime is 2478478397. The reversal of 2478478393 is 3938748742.

2478478393 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2478478393 - 2⁵ = 2478478361 is a prime.

It is a super-2 number, since 2×2478478393² = 12285710289135724898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2478478397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166753 + ... + 181006.

It is an arithmetic number, because the mean of its divisors is an integer number (619708320).

Almost surely, 2^2478478393 is an apocalyptic number.

It is an amenable number.

2478478393 is a deficient number, since it is larger than the sum of its proper divisors (354887).

2478478393 is an equidigital number, since it uses as much as digits as its factorization.

2478478393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354886.

The product of its digits is 8128512, while the sum is 55.

The square root of 2478478393 is about 49784.3187459666. The cubic root of 2478478393 is about 1353.3030035925.

The spelling of 2478478393 in words is "two billion, four hundred seventy-eight million, four hundred seventy-eight thousand, three hundred ninety-three".