4878649 has 4 divisors (see below), whose sum is σ = 5135440. Its totient is φ = 4621860.

The previous prime is 4878617. The next prime is 4878661. The reversal of 4878649 is 9468784.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4878649 - 2⁵ = 4878617 is a prime.

It is a super-3 number, since 3×4878649³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

4878649 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4878599 and 4878608.

It is not an unprimeable number, because it can be changed into a prime (4878149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128367 + ... + 128404.

It is an arithmetic number, because the mean of its divisors is an integer number (1283860).

Almost surely, 2^4878649 is an apocalyptic number.

It is an amenable number.

4878649 is a deficient number, since it is larger than the sum of its proper divisors (256791).

4878649 is a wasteful number, since it uses less digits than its factorization.

4878649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256790.

The product of its digits is 387072, while the sum is 46.

The square root of 4878649 is about 2208.7663977886. The cubic root of 4878649 is about 169.6028676869.

The spelling of 4878649 in words is "four million, eight hundred seventy-eight thousand, six hundred forty-nine".