52778649 has 16 divisors (see below), whose sum is σ = 87736320. Its totient is φ = 27417360.

The previous prime is 52778639. The next prime is 52778653. The reversal of 52778649 is 94687725.

52778649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 52778649 - 2⁴ = 52778633 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 52778598 and 52778607.

It is not an unprimeable number, because it can be changed into a prime (52778639) 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 15 ways as a sum of consecutive naturals, for example, 114009 + ... + 114470.

It is an arithmetic number, because the mean of its divisors is an integer number (5483520).

Almost surely, 2^52778649 is an apocalyptic number.

It is an amenable number.

52778649 is a deficient number, since it is larger than the sum of its proper divisors (34957671).

52778649 is a wasteful number, since it uses less digits than its factorization.

52778649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228500.

The product of its digits is 846720, while the sum is 48.

The square root of 52778649 is about 7264.8915339460. The cubic root of 52778649 is about 375.1049164218.

The spelling of 52778649 in words is "fifty-two million, seven hundred seventy-eight thousand, six hundred forty-nine".