478878831 has 64 divisors (see below), whose sum is σ = 809740800. Its totient is φ = 277820928.

The previous prime is 478878781. The next prime is 478878847. The reversal of 478878831 is 138878874.

It is not a de Polignac number, because 478878831 - 2⁷ = 478878703 is a prime.

It is a super-2 number, since 2×478878831² = 458649869559853122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478878931) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 374365 + ... + 375641.

It is an arithmetic number, because the mean of its divisors is an integer number (12652200).

Almost surely, 2^478878831 is an apocalyptic number.

478878831 is a deficient number, since it is larger than the sum of its proper divisors (330861969).

478878831 is a wasteful number, since it uses less digits than its factorization.

478878831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365 (or 1359 counting only the distinct ones).

The product of its digits is 2408448, while the sum is 54.

The square root of 478878831 is about 21883.3002766950. The cubic root of 478878831 is about 782.3634379439.

The spelling of 478878831 in words is "four hundred seventy-eight million, eight hundred seventy-eight thousand, eight hundred thirty-one".