478648829 has 4 divisors (see below), whose sum is σ = 479281884. Its totient is φ = 478015776.

The previous prime is 478648823. The next prime is 478648831. The reversal of 478648829 is 928846874.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 928846874 = 2 ⋅464423437.

It can be written as a sum of positive squares in 2 ways, for example, as 269846329 + 208802500 = 16427^2 + 14450^2 .

It is a cyclic number.

It is not a de Polignac number, because 478648829 - 2⁴ = 478648813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478648823) 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, 315392 + ... + 316905.

It is an arithmetic number, because the mean of its divisors is an integer number (119820471).

Almost surely, 2^478648829 is an apocalyptic number.

It is an amenable number.

478648829 is a deficient number, since it is larger than the sum of its proper divisors (633055).

478648829 is an equidigital number, since it uses as much as digits as its factorization.

478648829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633054.

The product of its digits is 6193152, while the sum is 56.

The square root of 478648829 is about 21878.0444510016. The cubic root of 478648829 is about 782.2381634066.

The spelling of 478648829 in words is "four hundred seventy-eight million, six hundred forty-eight thousand, eight hundred twenty-nine".