4978865 has 8 divisors (see below), whose sum is σ = 6180840. Its totient is φ = 3845632.

The previous prime is 4978847. The next prime is 4978867. The reversal of 4978865 is 5688794.

It can be written as a sum of positive squares in 4 ways, for example, as 446224 + 4532641 = 668^2 + 2129^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4978865 - 2⁶ = 4978801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4978867) 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 7 ways as a sum of consecutive naturals, for example, 17024 + ... + 17313.

It is an arithmetic number, because the mean of its divisors is an integer number (772605).

Almost surely, 2^4978865 is an apocalyptic number.

It is an amenable number.

4978865 is a deficient number, since it is larger than the sum of its proper divisors (1201975).

4978865 is a wasteful number, since it uses less digits than its factorization.

4978865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34371.

The product of its digits is 483840, while the sum is 47.

The square root of 4978865 is about 2231.3370431201. The cubic root of 4978865 is about 170.7563187790.

The spelling of 4978865 in words is "four million, nine hundred seventy-eight thousand, eight hundred sixty-five".