477632778 has 64 divisors (see below), whose sum is σ = 1126137600. Its totient is φ = 132198912.

The previous prime is 477632723. The next prime is 477632797. The reversal of 477632778 is 877236774.

It is a self number, because there is not a number n which added to its sum of digits gives 477632778.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 454798 + ... + 455846.

It is an arithmetic number, because the mean of its divisors is an integer number (17595900).

Almost surely, 2^477632778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 477632778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (563068800).

477632778 is an abundant number, since it is smaller than the sum of its proper divisors (648504822).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

477632778 is a wasteful number, since it uses less digits than its factorization.

477632778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391.

The product of its digits is 2765952, while the sum is 51.

The square root of 477632778 is about 21854.8113238252. The cubic root of 477632778 is about 781.6842730479.

The spelling of 477632778 in words is "four hundred seventy-seven million, six hundred thirty-two thousand, seven hundred seventy-eight".