63278433 has 6 divisors (see below), whose sum is σ = 91402194. Its totient is φ = 42185616.

The previous prime is 63278407. The next prime is 63278441. The reversal of 63278433 is 33487236.

63278433 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 63250209 + 28224 = 7953^2 + 168^2 .

It is not a de Polignac number, because 63278433 - 2²⁰ = 62229857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63278443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3515460 + ... + 3515477.

It is an arithmetic number, because the mean of its divisors is an integer number (15233699).

Almost surely, 2^63278433 is an apocalyptic number.

It is an amenable number.

63278433 is a deficient number, since it is larger than the sum of its proper divisors (28123761).

63278433 is a wasteful number, since it uses less digits than its factorization.

63278433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7030943 (or 7030940 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The square root of 63278433 is about 7954.7742268401. The cubic root of 63278433 is about 398.4910502512.

The spelling of 63278433 in words is "sixty-three million, two hundred seventy-eight thousand, four hundred thirty-three".