478878449 has 4 divisors (see below), whose sum is σ = 547289664. Its totient is φ = 410467236.

The previous prime is 478878443. The next prime is 478878461. The reversal of 478878449 is 944878874.

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 a de Polignac number, because none of the positive numbers 2^k-478878449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478878443) 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, 34205597 + ... + 34205610.

It is an arithmetic number, because the mean of its divisors is an integer number (136822416).

Almost surely, 2^478878449 is an apocalyptic number.

It is an amenable number.

478878449 is a deficient number, since it is larger than the sum of its proper divisors (68411215).

478878449 is an equidigital number, since it uses as much as digits as its factorization.

478878449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68411214.

The product of its digits is 14450688, while the sum is 59.

The square root of 478878449 is about 21883.2915485765. The cubic root of 478878449 is about 782.3632299143.

The spelling of 478878449 in words is "four hundred seventy-eight million, eight hundred seventy-eight thousand, four hundred forty-nine".