478320823 has 16 divisors (see below), whose sum is σ = 517466880. Its totient is φ = 440496000.

The previous prime is 478320803. The next prime is 478320827. The reversal of 478320823 is 328023874.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478320823 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 (478320827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166348 + ... + 169198.

It is an arithmetic number, because the mean of its divisors is an integer number (32341680).

Almost surely, 2^478320823 is an apocalyptic number.

478320823 is a deficient number, since it is larger than the sum of its proper divisors (39146057).

478320823 is a wasteful number, since it uses less digits than its factorization.

478320823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3078.

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 478320823 is about 21870.5469296037. The cubic root of 478320823 is about 782.0594398645.

The spelling of 478320823 in words is "four hundred seventy-eight million, three hundred twenty thousand, eight hundred twenty-three".