4778557 has 24 divisors (see below), whose sum is σ = 6047232. Its totient is φ = 3693600.

The previous prime is 4778539. The next prime is 4778567. The reversal of 4778557 is 7558774.

It is not a de Polignac number, because 4778557 - 2⁷ = 4778429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4778567) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78307 + ... + 78367.

It is an arithmetic number, because the mean of its divisors is an integer number (251968).

Almost surely, 2^4778557 is an apocalyptic number.

It is an amenable number.

4778557 is a deficient number, since it is larger than the sum of its proper divisors (1268675).

4778557 is a wasteful number, since it uses less digits than its factorization.

4778557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 118 counting only the distinct ones).

The product of its digits is 274400, while the sum is 43.

The square root of 4778557 is about 2185.9910795792. The cubic root of 4778557 is about 168.4349674342.

It can be divided in two parts, 4778 and 557, that added together give a palindrome (5335).

The spelling of 4778557 in words is "four million, seven hundred seventy-eight thousand, five hundred fifty-seven".